Absorbent article with channels and method for manufacturing thereof

ABSTRACT

A method for manufacturing an absorbent article, said method comprising guiding a first sheet material along a rotating member, wherein a surface of said rotating member is provided with a pattern with at least one suction zone and at least one non-suction zone; applying an absorbent material on said first sheet material on the rotating member; locally removing the absorbent material applied on at least one attachment portion of the first sheet material located above the at least one non-suction zone, such that at least one remaining portion of the first sheet material located above the at least one suction zone is covered with absorbent material and substantially no absorbent material is present on the at least one attachment portion; applying a second sheet material on top of the absorbent material on the first sheet material.

CLAIM FOR PRIORITY

This application is a continuation of and claims the benefit of priorityof U.S. application Ser. No. 16/613,555, filed Nov. 14, 2019, which is aU.S. National Stage Filing under 35 U.S.C. 371 from InternationalApplication No. PCT/EP2018/062386, filed on May 14, 2018, and publishedas WO2018/210753 on Nov. 22, 2018, which claims the benefit of priorityto European Application No. 17202006.7, filed on Nov. 16, 2017 and toEuropean Application No. 17200847.6, filed on Nov. 9, 2017 and toEuropean Application No. 17198652.4, filed on Oct. 26, 2017 and toEuropean Application No. 17198368.7, filed on Oct. 25, 2017 and toEuropean Application No. 17198349.7, filed on Oct. 25, 2017 and toEuropean Application No. 17196434.9, filed on Oct. 13, 2017 and toEuropean Application No. 17190395.8, filed on Sep. 11, 2017 and toEuropean Application No. 17183453.4, filed on Jul. 27, 2017 and toEuropean Application No. 17171110.4, filed on May 15, 2017; the benefitof priority of each of which is hereby claimed herein, and whichapplications and publication are hereby incorporated herein by referencein their entirety.

TECHNICAL FIELD

The present invention pertains to the technical field of absorbentarticles, more preferably disposable personal care articles such asdiapers, baby pants, adult incontinent garments, and the like, and toabsorbent structures for use in such absorbent articles. Morespecifically the present invention relates to an absorbent structurecomprising an absorbent core between a topsheet and a backsheet. Thepresent invention also relates to a method and apparatus formanufacturing such an absorbent article.

BACKGROUND

Absorbent articles such as diapers, baby pants, adult incontinentgarments and the like, typically comprise an absorbent core, positionedin between a liquid permeable or pervious, hydrophilic or semihydrophilic topsheet and a liquid impermeable or impervious backsheet.The absorbent core comprises absorbent material that is able to absorbfluid and liquid bodily excretions of the user of the absorbent article.

The absorbent material of the absorbent core may be an absorbentparticulate polymer material which is dispersed in a matrix of cellulosefibers or fluff pulp in order to prevent the particulate material fromaggregating, as well as to prevent gel blocking. Gel blocking can occurwhen the absorbent particulate polymer material absorbs liquid, as theytend to typically swell and form a gel structure. This gel structureoften blocks the further transfer of liquid into the remaining absorbentcore. As a result, the liquid may be unable to reach the remainingabsorbent particulate polymer material and the efficiency of the overallabsorbent article decreases significantly. Existing fluff pulp materialsare not suited to cope with rapid, subsequent insults of fluid sincethey possess limited distribution capacities. Moreover existing fluffpulp materials exhibit a limited capacity of overall liquid intake.Furthermore, existing absorbent cores containing fluff pulp have alimited wet integrity, which leads to the shape and fit of the absorbentarticle being deformed when e.g. an absorbent article is being worn by ababy which moves around.

In recent years, there has been a strong demand for more flexible,thinner, light-weight, absorbent articles to resolve various problemsassociated with manufacturing, marketing, design, fit, wearing comfort,distribution, garbage disposal, material and energy consumption,transport and storage costs and the like. This lead to the search forand the development and production of absorbent articles of which theabsorbent cores contains little to no cellulose fibers or fluff pulp, asthe latter tend to be quite bulky, thus rendering generally more thickabsorbent cores which reduces the overall wearing comfort of the user ofthe absorbent article.

Hence, various absorbent cores containing little to no cellulose fibersor fluff pulp were developed in the past few years to try and overcomethe above drawbacks, whereby the relative high amounts of absorbentpolymer materials necessary to replace the absorption, distribution andretention capacity of the excluded cellulose fibers and/or fluff pulpwere loaded, distributed and immobilized within these new absorbentcores according to several techniques. However given the ability andcapacity of the absorbent core to absorb, transport and retain fluid andliquids is heavily dependent upon the form, position and/or mannerwherein these absorbent polymer materials are incorporated within theabsorbent core several drawback remained unsolved. In general thesubstantially heterogeneously distributed absorbent cores havingnon-continuous compartments and/or clusters of absorbent polymermaterial have in general proven to be better in coping with the abovementioned problems, nevertheless they also proved to remainunsatisfactory within most of the available absorbent articles.Especially problematic however, were the substantially homogenouslydistributed absorbent structures having continuous layers of absorbentpolymer particulate material given they exhibit a substantiallyhomogenous swollen absorbent polymer material area for second, third andnext liquid insults wherein the dry and/or wetted absorbent polymermaterial layer may actually act as a liquid barrier. These problems andcomplications are especially prevalent within very flexible, thin,lightweight absorbent structures wherein high amounts of absorbentpolymer material are distributed within the absorbent core of theabsorbent article. Adding even more, thicker and larger overlyingacquisition and dispersing layers did not at all resolve the above citedabsorption, distribution and retention problems and moreover made theabsorbent articles commercially unviable, environmentally unsustainableand more difficult to manufacture, store and transport.

Furthermore an existing problem which has been associated with suchabsorbent cores containing no or little cellulose fibers or fluff pulpis related to the migration, loss and leakage of the absorbentparticulate polymer material from the absorbent article during dryand/or wet state, which leads to irritation, skin problems and overalldiscomfort for the user. This again is also especially true in the morehomogenously distributed absorbent structures given their immobilizationand liquid distribution properties remain unsatisfactory to date. Thislack of effective and efficient immobilization and liquid distributionlead to dysfunctional absorbent articles due to lowered uptake capacity,gel blocking, enhanced rewet values, leakages and the creation ofruptures and/or pinholes through the liquid pervious topsheet and/orliquid impervious backsheet of such absorbent articles.

Absorbent cores generally have a high absorbent capacity and theabsorbent core may expand several times its weight and volume. Theseincreases may cause the absorbent article to deform and/or to sag in thecrotch region as they become saturated with liquid. This may cause leaksto occur via a longitudinal and/or transversal edge of the absorbentarticle.

A further existing problem of absorbent articles is that an absorbentcapacity of an absorbent core of the absorbent article is often notfully used when liquid insults are received by the absorbent core atregions which are close to an edge of the absorbent article and/orabsorbent core. This might occur especially when a wearer of theabsorbent article is lying down (sideways) and/or is moving frequentlyand/or intensively. This makes the absorbent articles prone to leakage.

SUMMARY

The object of embodiments of the invention is to provide an absorbentarticle of the type stated in the preamble, with improved liquiddistribution and absorption capacities.

Aspects—Channel Width

According to an aspect of the invention there is provided an absorbentarticle comprising a liquid pervious topsheet, a liquid imperviousbacksheet, and an absorbent core comprising an absorbent materialbetween a top core wrap sheet and a back core wrap sheet, said absorbentcore being positioned in between said topsheet and said backsheet. Theabsorbent core has a first and second longitudinal edge and a first andsecond transverse edge. The absorbent core is provided with a pluralityof attachment Zones comprising at least a first and a second attachmentzone, said first and second attachment zone extending next to each otherfrom a crotch region in the direction of the first and/or secondtransverse edge. In the first and second attachment zone any one of thefollowing conditions is fulfilled: the top core wrap sheet is attachedto said back core wrap sheet along an attachment which extends, seen ina transverse direction of the absorbent core, over a transverse distancewhich is at least 1 mm, preferably at least 2 mm, more preferably atleast 3 mm, and most preferably at least 4 mm; the top core wrap sheetis attached to said back core wrap sheet along a discontinuousattachment at a plurality of locations at a distance of each other, seenin the transverse direction of the absorbent core, preferably over atransverse distance which is at least 1 mm, preferably at least 2 mm,more preferably at least 3 mm, and most preferably at least 4 mm. Uponwetting of the absorbent material of the absorbent article, any one ofthe above described conditions leads to the creation of a first andsecond channel at the first and second attachment zone, respectively.

Embodiments are based inter alia on the inventive insight that, byproviding a plurality of attachment zones in the absorbent core, acorresponding plurality of channels is created in the absorbent coreupon wetting such that liquid can be distributed and absorbed in animproved manner. Indeed, liquid can flow in the plurality of attachmentzones and can be absorbed by the absorbent core through the side wallsdelimiting the plurality of attachment zones, in addition to liquidbeing absorbed through the top surface of the absorbent core. Becausethe first and second attachment zones extend in the direction of thefirst and/or second transverse edge as do the created first and secondchannel, liquid can be distributed adequately. Both the plurality ofattachments zones, before swelling of the absorbent material, and theplurality of created channels, during and after swelling of theabsorbent material, allow for a more rapid distribution of liquid,especially towards the transverse edges of the absorbent core. Inaddition to a fast and adequate distribution of liquid in thelongitudinal direction, the presence of the plurality of attachmentzones and/or the creation of the corresponding plurality of channelsleads to a more rapid and efficient distribution of liquid in both thetransverse direction of the absorbent core and in the depth direction ofthe absorbent core. Furthermore, overall liquid intake by the absorbentcore is faster as a result. By giving the attachment zones a sufficientwidth, depth and/or length a quantity of liquid can be held temporarilywhilst the absorption takes place. Because the liquid is distributedquickly, this effect is established not only during a first liquidinsult, but also during an eventual second liquid insult, a third liquidinsult and a fourth liquid insult. Further, the first and secondattachment zones allow the absorbent core to swell in the shape of a tubwhile the first and second channels are formed. Indeed, a portion of theabsorbent core between the first longitudinal edge and the firstattachment zone will be allowed to rotate inward and upward and aportion of the absorbent core between the second longitudinal edge andthe second attachment zone will be allowed to rotate inward and upward,which is made possible thanks to the sufficiently wide first and secondattachment zone.

In a preferred embodiment, the first attachment zone and the attachmentzone are substantially parallel and extend in a longitudinal directionof the absorbent core. In an alternative embodiment an angle between thefirst attachment zone and a longitudinal direction of the absorbent coreand an angle between the second attachment zone and the longitudinaldirection of the absorbent core is smaller than 5. In that mannerappropriate first and second channels and an appropriate tub-shape ofthe absorbent product can be obtained upon wetting of the absorbentmaterial.

In an exemplary embodiment, the attachment between the top core wrapsheet and the back core wrap sheet in the first and the secondattachment zone is a permanent attachment, and the absorbent core isconfigured such that, in a wetted state of the absorbent material, theabsorbent material extends over the first and second attachment zone. Inthat matter, the absorbent material bulges over the first and secondattachment zone, thereby causing a tension in the absorbent core whichcauses the absorbent core, which is in a substantially flat state whendry, to curl up to form a tub shaped and/or cup shaped absorbent coreincluding the first and second channel.

According to an aspect of the invention, there is provided an absorbentarticle comprising a liquid pervious topsheet, a liquid imperviousbacksheet, and an absorbent core comprising an absorbent materialbetween a top core wrap sheet and a back core wrap sheet, said absorbentcore being positioned in between said topsheet and said backsheet. Theabsorbent core has a first and second longitudinal edge and a first andsecond transverse edge. The absorbent core is provided with a pluralityof attachment zones comprising at least a first and a second attachmentzone, said first and second attachment zone each extending from a crotchregion in the direction of the first and/or second transverse edge.Preferably, the first channel is arranged adjacent to the secondchannel, seen in a transverse direction of the absorbent core. In thefirst and second attachment zone the top core wrap sheet is attached tothe back core wrap sheet through a semi-permanent attachment configuredto release after having been in contact with liquid.

Embodiments are based inter alia on the inventive insight that, byproviding a plurality of attachment zones in the absorbent core, incombination with semi-permanent attachments, the absorbent core canswell in an improved manner, resulting in an improved liquid absorption.Indeed, when liquid flows in the attachments zones, the attachments arereleased and the absorbent core can “fill” or “overlap” the attachmentzones and/or channels, wherein a portion of the absorbent core betweenthe first longitudinal edge and the first channel will be allowed torotate inward and upward and a portion of the absorbent core between thesecond longitudinal edge and the second channel will be allowed torotate inward and upward, which is made possible thanks to the first andsecond channel and the swelling underneath the released top core wrapsheet.

In an exemplary embodiment of the second aspect, the top core wrap sheetis attached to the back core wrap sheet along a continuous ordiscontinuous attachment which extends, seen in a transverse directionof the absorbent core, over a transverse distance which is at least 1mm, preferably at least 2 mm, more preferably at least 3 mm, and mostpreferably at least 4 mm.

In an exemplary embodiment of the second aspect, the semi-permanentattachment is configured to release after having been in contact withurine for a period of time, e.g. a period of time is smaller than 30 s.

According to an aspect of the invention, there is provided an absorbentarticle comprising a liquid pervious topsheet, a liquid imperviousbacksheet, and an absorbent core comprising an absorbent materialbetween a top core wrap sheet and a back core wrap sheet, the absorbentcore being positioned in between said topsheet and said backsheet. Theabsorbent core has a first and second longitudinal edge and a first andsecond transverse edge. The absorbent core is provided with at least afirst attachment zone. In the first attachment zone any one of thefollowing conditions is fulfilled: the top core wrap sheet is attachedto the back core wrap sheet along an attachment which extends, seen in atransverse and/or longitudinal direction of the absorbent core, over atransverse and/or longitudinal distance which is at least 1 mm,preferably at least 2 mm, more preferably at least 3 mm, most preferablyat least 4 mm; the top core wrap sheet is attached to the back core wrapsheet along a discontinuous attachment at a plurality of locations at adistance of each other, seen in the transverse and/or longitudinaldirection of the absorbent core. Upon wetting of the absorbent material,a first channel is created at said first attachment zone.

According to an exemplary embodiment, the first attachment zone extendsfrom a crotch region in the direction of the first and/or secondtransverse edge.

According to an alternative embodiment, the first attachment zoneextends in the transversal direction of the absorbent core in betweenthe first and second longitudinal edge.

According to a preferred embodiment of the fourth aspect, the absorbentcore is provided with at least a second attachment zone. The at leastone second attachment zone extends in the transversal direction of theabsorbent core in between the first and second longitudinal edge.

According to a preferred embodiment the plurality of attachment zonesfurther comprises a third and a fourth attachment zone located at adistance of each other, the third and fourth attachment zone eachextending in the direction of the first and/or second transverse edge.

Preferably, the distance between the first and the second attachmentzone is different from the distance between the third and the fourthattachment zone.

According to an exemplary embodiment, the absorbent core has a frontportion extending at one side of a transverse crotch line and a rearportion extending at the other side of the transverse crotch line. Thefirst and second attachment zone extend at least in the front portion ofthe absorbent core; and the third and fourth attachment zone extend atleast in the rear portion of the absorbent core.

The distance between the first and the second attachment zone may besmaller or bigger than the distance between the third and the fourthattachment zone.

In a preferred embodiment, the first attachment zone is connected to thethird attachment zone through a first transverse attachment zone, andthe second attachment zone is connected to the fourth attachment zonethrough a second transverse attachment zone.

In a possible embodiment, the first and the second attachment zoneextend in a longitudinal direction of the absorbent core over a lengthwhich is longer than the length of the third and fourth attachment zone,and the first and the second attachment zone are located between thethird and fourth attachment zone.

In an exemplary embodiment, the third attachment zone and the fourthattachment zone are arranged symmetrically with respect to alongitudinal center line of the absorbent core extending between thefirst and second transverse edge.

In a preferred embodiment the distance between the first and the secondattachment zone is between 10 mm and 50 mm, preferably between 15 mm and30 mm.

According to an exemplary embodiment, the length of the first and thesecond attachment zone is larger than 60 mm, preferably larger than 70mm.

According to an exemplary embodiment, the absorbent article furthercomprises at least one transversal attachment zone extending from an endportion of the first attachment zone to a corresponding end portion ofthe second attachment zone, wherein upon wetting of the absorbentmaterial, a third channel is created at said transversal attachmentzone, thus connecting the first and second channels.

The skilled person will understand that the hereinabove describedtechnical considerations and advantages for absorbent articleembodiments also apply to the below described method embodiments,mutatis mutandis.

According to a fifth aspect, there is provided a method formanufacturing an absorbent article, said method comprising the steps of:

-   -   guiding a first sheet material along a rotating member, wherein        a surface of said rotating member is provided with a pattern        with suction zones and non-suction zones; wherein said        non-suction zones comprise at least a first and a second        elongate zone extending in a circumferential direction of the        rotating member;    -   applying an absorbent material on said first sheet material on        the rotating member such that the suction zones are covered with        absorbent material and substantially no absorbent material is        present on the non-suction zones;    -   applying a second sheet material on top of the absorbent        material on the first sheet material; wherein one of said first        and second sheet material is a top core wrap sheet material, and        the other one is a back core wrap sheet material;    -   attaching said first sheet material to said second sheet        material at least in the areas where substantially no absorbent        material is present, and such that at least a first and a second        attachment zone are formed.

In a preferred embodiment, the attaching is done by applying pressureand heat on the top core wrap sheet material and/or the back core wrapsheet material in the areas where substantially no absorbent material ispresent.

According to a further embodiment, the attaching is done by a rotatingmember which is provided with at least a first and a second seal ribdimensioned for applying pressure and heat on the top core wrap sheetmaterial and/or the back core wrap sheet material in the areas wheresubstantially no absorbent material is present in order to create thefirst and second attachment zone, respectively.

In a preferred embodiment, a binder is applied to at least one portionof the first sheet material at a distance from the intended position ofthe first and second attachment zones, before the absorbent material isapplied on said first sheet material and a binder is applied to at leastone portion of the second sheet material before it is applied on top ofthe absorbent material on the first sheet material. Preferably, the atleast one portion of the first sheet material and the at least oneportion of the second sheet material are chosen such that in theapplication and attachment of the first sheet material to the secondsheet material the plurality of portions are complementary, whereinpreferably substantially the entire surface of the absorbent article isprovided with binder on either the first sheet material or the secondsheet material.

According to a further aspect there is provided a method formanufacturing an absorbent article, said method comprising:

a. guiding a first sheet material along a conveying or rotating member,wherein a surface of said conveying member is provided with a patternwith at least one suction zone and non-suction zone; wherein said atleast one non-suction zone comprises at least a first zone extending ina conveying direction of the conveying member;

b. applying an absorbent material on said first sheet material on therotating member such that the at least one suction zone is covered withabsorbent material and substantially no absorbent material is present onthe at least one non-suction zone:

c. applying a second sheet material on top of the absorbent material onthe first sheet material; wherein one of said first and second sheetmaterial is a top core wrap sheet material, and the other one is a backcore wrap sheet material;

d. attaching said first sheet material to said second sheet material atleast in the areas where substantially no absorbent material is present,and such that at least at least a first attachment zone is formed.

The attaching may be done by applying pressure and heat on the top corewrap sheet material and/or the back core wrap sheet material in theareas where substantially no absorbent material is present.

The attaching may be done by a rotating member which is provided with atleast a first seal rib dimensioned for applying pressure and heat on thetop core wrap sheet material and/or the back core wrap sheet material inthe areas where substantially no absorbent material is present in orderto create the first attachment zone.

A first binder may be applied to at least one portion of the first sheetmaterial at a distance from the intended position of the firstattachment zone, prior to step b, and a second binder may be applied toat least one portion of the second sheet material prior to step c.Preferably, the at least one portion of the first sheet material and theat least one portion of the second sheet material are chosen such thatin the application and attachment of the first sheet material to thesecond sheet material the plurality of portions are complementary,wherein preferably substantially the entire surface of the absorbentarticle is provided with binder on either the first sheet material orthe second sheet material.

The first binder applied on at least one portion of the first sheetmaterial may be different from, preferably less strong than, the secondbinder applied on the at least one portion of the second sheet material.

The binder may be applied on at least one portion of the first sheetmaterial as a first layer having a first thickness, and on the at leastone portion of the second sheet material as a second layer having asecond thickness which is different from, preferably higher than, thefirst thickness.

The binder may be applied on the first sheet material as a plurality ofparallel first longitudinal stripes and on the second sheet material asa plurality of parallel second longitudinal stripes, wherein preferablya second longitudinal stripe thereof is located in between two firstlongitudinal stripes of the plurality of first longitudinal stripes.

Aspect—Color

According to an aspect of the invention, there is provided an absorbentarticle comprising a liquid pervious topsheet, a liquid imperviousbacksheet, and an absorbent core comprising an absorbent materialbetween a top core wrap sheet and a back core wrap sheet, said absorbentcore being positioned in between said topsheet and said backsheet. Theabsorbent core has a first and second longitudinal edge and a first andsecond transverse edge. The absorbent core is provided with a pluralityof attachment zones comprising at least a first and a second attachmentzone located a distance of each other, said first and second attachmentzone each extending from a crotch region in the direction of the firstand/or second transverse edge. A position and/or shape of one or moreattachment zones of the plurality of attachment zone is indicated bymeans of a distinguishable color and/or colored pattern.

Such embodiments have the advantage that, on the one hand the attachmentzones result in an improved liquid distribution and absorption of theliquid, and on the other hand, the color and/or pattern allows a user toeasily distinguish a front and a rear portion of the absorbent article.Indeed, by giving e.g. the first attachment zone a color and/or patternwhich is different from the color and/or pattern of the secondattachment zone, a user can remember easily e.g. which color has to beon the left or right side. The person skilled in the art understandsthat many color and/or pattern variants are possible which will allow auser to easily recognize a front and a rear portion. In addition to oralternative to allow a user to easily recognize the correct orientationof the absorbent article, the color and/or pattern which indicate theposition and/or shape of the attachment zones may be utilized to providemore information to a user about the absorbent article by linking aparticular color and/or pattern of the visual indication to a certaincharacteristic of the absorbent article such as size, type (e.g. diaperversus pants), etc.

In a preferred embodiment, the position of one or more of the pluralityof attachment zones is indicated by means of a printed ink layer.

In exemplary embodiments the distinguishable color and/or coloredpattern is provided on at least one of the topsheet, the top core wrapsheet, the backsheet and the back core wrap sheet. The color and/orcolored pattern may be provided on either side of the topsheet, the topcore wrap sheet, the backsheet and/or the back core wrap sheet. Inaddition or alternatively, the color and/or colored pattern is providedon an acquisition and/or a distribution layer of the absorbent article.

Features of the “channel width” aspects may be combined with thefeatures of the “color” aspect.

Aspects—Local Removing

According to an aspect of the invention there is provided a method formanufacturing an absorbent article, said method comprising:

a. guiding a first sheet material along a rotating member, wherein asurface of said rotating member is provided with a pattern with at leastone suction zone and at least one non-suction zone;

b. applying an absorbent material on said first sheet material on therotating member;

c. locally removing the absorbent material applied on at least oneattachment portion of the first sheet material located above the atleast one non-suction zone, such that at least one remaining portion ofthe first sheet material located above the at least one suction zone iscovered with absorbent material and substantially no absorbent materialis present on the at least one attachment portion;

d. applying a second sheet material on top of the absorbent material onthe first sheet material; wherein one of said first and second sheetmaterial is a top core wrap sheet material, and the other one is a backcore wrap sheet material;

e. attaching said first sheet material to said second sheet material atleast in the at least one attachment portion, and such that at least oneattachment zone is formed.

By locally removing the absorbent material on the at least oneattachment portion it is ensured that the at least one attachmentportion is substantially free of absorbent material which will result ina better attachment of the second sheet material to the first sheetmaterial in the at least one attachment zone.

The at least one non-suction zone may comprise at least one elongatezone extending in a circumferential direction of the rotating member. Inthat manner an elongate attachment zone is created allowing realizingelongate channels in the absorbent article.

The at least one non-suction zone may be formed by at least one elementprotruding outwardly from the surface of the rotating member. In otherwords the at least one suction zone may be delimited by an outwardlyprotruding non-suction element. In that manner the areas containingabsorbent material and the areas containing substantially no absorbentmaterial may be neatly delimited. For example, the at least oneoutwardly protruding element may be at least one elongated element, morepreferably a curved elongate element fixed to the outer surface of therotating member. Preferably the at least one element is removable. Inthat manner, depending on the amount and/or the type of absorbentmaterial and/or sheet material that is used, a suitably dimensionedelement may be chosen.

The locally removing of the absorbent material may be done by mechanicalmeans. In that manner a robust and simple means may be used to obtain anaccurate cleaning of the at least one attachment portion. The mechanicalmeans may be a rotatable mechanical means or a non-rotatable mechanicalmeans.

The locally removing of the absorbent material may be done by a firstbrush, e.g. a first roller brush. In other embodiments a scraper of awiper may be used with a scraping blade or a wiper blade, optionally incombination with a removal means. e.g. a suction means to remove thelocally removed absorbent material.

In addition or alternatively the locally removing of the absorbentmaterial may be done by causing an air flow above the at least oneattachment portion, e.g. using an air jet system.

The method may further comprise scraping the absorbent material appliedon the at least one remaining portion by a second roller brush, suchthat surface of the absorbent material is substantially even. Thissecond roller brush will be different from the first roller brush.Preferably the bristles of the second roller brush will be less flexiblethan the bristles of the first roller brush.

For example, the bristles of the second roller brush may be made ofmetal, whilst the bristles of the first roller brush may be made of aflexible plastic such as nylon.

The method further may comprise discarding and/or collecting and/orrecycling of the absorbent material removed from the at least oneattachment portion.

A binder may be applied to at least one portion of the first sheetmaterial at a distance from the intended position of the firstattachment zone, prior to step b, and/or wherein a binder may be appliedto at least one portion of the second sheet material including theintended position of the at least one attachment zone prior to step d.In that manner the fixation of the absorbent material to the first sheetmaterial in the at least one suction zone may be further improved.

The at least one portion of the first sheet material and the at leastone portion of the second sheet material may be chosen such that in theapplication and attachment of the first sheet material to the secondsheet material the plurality of portions are complementary, whereinpreferably substantially the entire surface of the absorbent article isprovided with binder on either the first sheet material or the secondsheet material.

The binder applied on at least one portion of the first sheet materialmay be different from, preferably less strong than, the binder appliedon the at least one portion of the second sheet material.

The binder may be applied on at least one portion of the first sheetmaterial as a first layer having a first thickness, and on the at leastone portion of the second sheet material as a second layer having asecond thickness which is different from, preferably higher than, thefirst thickness.

The binder may be applied on the first sheet material as a plurality ofparallel first longitudinal stripes and on the second sheet material asat least one second longitudinal stripe located in between two firstlongitudinal stripes of the plurality of first longitudinal stripes.

The attaching may be done by applying pressure and/or heat on the topcore wrap sheet material and/or the back core wrap sheet material in theat least one attachment portion.

The attaching may be done by a rotating member which is provided with atleast one seal rib dimensioned for applying pressure and heat on the topcore wrap sheet material and/or the back core wrap sheet material in theat least one attachment portion in order to create the at least oneattachment zone. This may be a seal rib having a substantiallycontinuous sealing surface or a seal rib provided with a pattern ofsealing element. In that manner the realized attachment zone maycomprise a continuous attachment zone or may comprise a series ofadjacent attachment areas.

According to a further aspect there is provided an apparatus formanufacturing an absorbent article, said apparatus comprising:

a. a rotating member (10) for guiding a first sheet material along asurface thereof, wherein the surface of said rotating member is providedwith at least one suction zone and at least one non-suction zone:

b. an application unit configured for applying an absorbent material onsaid first sheet material on the rotating member;

c. a removing unit configured for locally removing the absorbentmaterial applied on at least one attachment portion of the first sheetmaterial located above the at least one non-suction zone, such that atleast one remaining portion of the first sheet material located abovethe at least one suction zone is covered with absorbent material andsubstantially no absorbent material is present on the at least oneattachment portion;

d. a sheet feed unit configured for applying a second sheet material ontop of the absorbent material on the first sheet material; wherein oneof said first and second sheet material is a top core wrap sheetmaterial, and the other one is a back core wrap sheet material;

e. an attachment unit configured for attaching said first sheet materialto said second sheet material at least in the at least one attachmentportion.

The technical features and advantages explained above for the methodapply mutatis mutandis for the apparatus.

Preferably, the at least one non-suction zone may be provided with atleast one removable insert (forming the above stated protrudingelement). Even more preferably the at least one insert has asubstantially trapezoidal cross section having a bottom edge, a top edgeand two side edges leading from the bottom edge to a top edge, whereinthe top edge and the bottom edge are perpendicular on the transportdirection of the first sheet material in the apparatus, the bottom edgeis fixed to the rotating member, and the side edges delimit the suctionzones. Preferably the side edges converge towards each other in thedirection from the bottom edge to the top edge.

The removing unit may comprise a mechanical removal means configured forremoving the absorbent material applied on the at least one non-suctionzone of said first sheet material. In that manner a robust and simplemeans may be used to obtain an accurate cleaning of the at least oneattachment portion. The mechanical means may be a rotatable mechanicalmeans or a non-rotatable mechanical means.

The mechanical means may comprise a first brush, e.g. a first rollerbrush. The first roller brush may have bristles comprising a flexibleplastic material, such as nylon. An axis of the first roller brush maybe parallel to an axis of the rotating member.

The removing unit may comprise a first adjusting means configured foradjusting a distance between the mechanical removal means (e.g. thefirst roller brush) and rotating member.

The removing unit may comprise a first variable-speed motor configuredfor driving the mechanical removal means, such as the first rollerbrush.

The removing unit may comprise an air jet system configured for removingthe absorbent material applied on the first sheet material above the atleast one non-suction zone.

The apparatus may further comprises a second roller brush configured forscraping the absorbent material applied on the at least one suction zonesuch that surface of the absorbent material is substantially even. Thebristles of the second roller brush may be less flexible than thebristles of the first roller brush. The bristles of the second rollerbrush may comprise metal material. An axis of the second roller brushmay be parallel to the axis of the rotating member.

The apparatus may further comprise a discharge means configured fordiscarding and/or collecting and/or recycling of the removed absorbentmaterial. The discharge means may comprise a vacuum source.

The attaching unit may be a rotating member which is provided with atleast one seal rib dimensioned for applying pressure and/or heat on thetop core wrap sheet material and/or the back core wrap sheet material inthe at least one attachment portion in order to create the at least oneattachment zone.

The apparatus may further comprise first means to apply binder to atleast one portion of the first sheet material at a distance from thefirst zone before the application unit applies absorbent material, andfurther comprise second means to apply binder to at least one portion ofthe second sheet material including the intended position of the atleast one attachment zone before the sheet feed unit applies this secondsheet material on top of the absorbent material on the first sheetmaterial.

The first means may be configured to apply a first binder on the firstsheet material as a plurality of parallel first longitudinal stripes andthe second means may be configured to apply a second binder on thesecond sheet material as at least one second longitudinal stripe locatedin between two first longitudinal stripes of the plurality of firstlongitudinal stripes.

The first means may be configured to apply a first binder and the secondmeans may be configured to apply a second binder which is different fromthe first binder.

Aspect—Binder

According to another aspect of the invention there is provided anabsorbent article comprising a liquid pervious topsheet, a liquidimpervious backsheet, and an absorbent core comprising an absorbentmaterial between a top core wrap sheet and a back core wrap sheet, saidabsorbent core being positioned in between said topsheet and saidbacksheet. The absorbent core has a first and second longitudinal edgeand a first and second transverse edge. The absorbent core is providedwith a plurality of attachment zones comprising at least a first and asecond attachment zone, said first and second attachment zone extendingnext to each other from a crotch region in the direction of the firstand/or second transverse edge. A first binder is arranged in a firstarea between the top core wrap sheet and the back core wrap sheet at adistance from the first and second attachment zone, and a second binderis arranged in a second area between the top core wrap sheet and theback core wrap sheet. Preferably, the first area is substantiallycomplementary to the second area. Preferably, the second area includesthe first and second attachment zone.

According to yet another aspect of the invention there is provided anabsorbent article comprising a liquid pervious topsheet, a liquidimpervious backsheet, and an absorbent core comprising an absorbentmaterial between a top core wrap sheet and a back core wrap sheet, saidabsorbent core being positioned in between said topsheet and saidbacksheet. The absorbent core has a first and second longitudinal edgeand a first and second transverse edge. The absorbent core is providedwith at least a first attachment zone extending from a crotch region inthe direction of the first and/or second transverse edge. A first binderis arranged in a first area between the top core wrap sheet and the backcore wrap sheet at a distance from the first attachment zone, and asecond binder is arranged in a second area between the top core wrapsheet and the back core wrap sheet. Preferably, the first area issubstantially complementary to the second area. Preferably, the secondarea includes the first and second attachment zone.

According to an exemplary embodiment the first binder is different fromthe second binder.

According to another exemplary embodiment the first binder is the sameas the second binder, and a transition zone is distinguishable betweenthe first area and the second area.

According to an exemplary embodiment the first binder is arranged as alayer having a first thickness and the second binder is arranged as alayer having a second thickness which is different from the firstthickness, preferably higher than the first thickness.

According to an exemplary embodiment the first area comprises aplurality of longitudinal stripes, and/or the second area comprises aplurality of longitudinal stripes.

According to an embodiment, a first binder is applied to at least oneportion of the back core wrap sheet at a distance from the intendedposition of the first and/or second attachment zones before theabsorbent material is applied, and a second binder is applied to atleast one portion of the top core wrap sheet before it is applied on topof the absorbent material on the back core wrap sheet.

According to an alternative embodiment, a first binder is applied to atleast one portion of the top core wrap sheet at a distance from theintended position of the first and/or second attachment zones before theabsorbent material is applied, and a second binder is applied to atleast one portion of the back core wrap sheet before it is applied ontop of the absorbent material on the back core wrap sheet. Preferably,the at least one portion of the top core wrap sheet and the at least oneportion of the back core wrap sheet are chosen such that in theapplication and attachment of the top core wrap sheet to the back corewrap sheet the plurality of portions are complementary, whereinpreferably substantially the entire surface of the absorbent article isprovided with binder on either the top core wrap sheet or the back corewrap sheet. According to an embodiment the first and second binder arethe same binder. In alternative embodiments, the first and second binderare mutually different binders, such as different glues. It is clear tothe skilled person that the first and second binder may be applied ineither layers with the same thickness, or layers with a differentthickness.

The skilled person understands that an absorbent article as describedabove, more in particular in view of the application of binder, can bedistinguished from absorbent articles which are manufactured otherwise.More in particular, the above described application of binder, such asglue, is distinguishable in an absorbent article by examining thepresent bonds within the particular absorbent article by means of anyone of the following: color analysis, UV analysis, chemical analysis,and the like. In other words, by examining the absorbent article, theskilled person can determine which type of binder has been used, wherethe particular binder has been applied, how many layers of binder havebeen applied, etc.

Aspects—Bridging Zone

According to an aspect of the invention there is provided an absorbentarticle comprising a liquid pervious topsheet, a liquid imperviousbacksheet, and an absorbent core comprising an absorbent materialbetween a top core wrap sheet and a back core wrap sheet, said absorbentcore being positioned in between said topsheet and said backsheet. Theabsorbent core has a first and second longitudinal edge and a first andsecond transverse edge, wherein the absorbent core is provided with aplurality of attachment zones comprising at least one front attachmentzone and at least one rear attachment zone and with at least onebridging zone extending at least partially between said front and rearattachment zone. The at least one front attachment zone and at least onerear attachment zone, when projected on a longitudinal direction of theabsorbent core, do not overlap or overlap only partially and thebridging zone extends from a first longitudinal portion of the absorbentcore to a second longitudinal portion of the absorbent core, wherein thefirst longitudinal portion is defined between the first longitudinaledge and a longitudinal center axis of the absorbent core and the secondlongitudinal portion is defined between the second longitudinal edge andthe longitudinal center axis of the absorbent core, such that uponwetting of the absorbent material, a front and rear channel are createdat said front and rear attachment zone, respectively, wherein thebridging zone allows a liquid flow between the first longitudinalportion and the second longitudinal portion.

Embodiments are based inter alia on the inventive insight that, byproviding a plurality of attachment zones in the absorbent core, acorresponding plurality of channels is created in the absorbent coreupon wetting such that liquid can be distributed and absorbed in animproved manner. Indeed, liquid can flow in the plurality of attachmentzones and can be absorbed by the absorbent core through the side wallsof the plurality of attachment zones, in addition to liquid beingabsorbed through the top surface of the absorbent core. Both the atleast one front and at least one rear attachments zones, before swellingof the absorbent material, and the plurality of created channels, duringand after swelling of the absorbent material, allow for a more rapiddistribution of liquid, especially towards the transverse edges of theabsorbent core. In addition to a fast and adequate distribution ofliquid in the longitudinal direction by providing at least one front andone rear attachment zone, the presence of the plurality of attachmentzones and/or the creation of the corresponding plurality of channelsleads to a more rapid and efficient distribution of liquid in the depthdirection of the absorbent core. Further in addition, by providing atleast one bridging zone which extends at least partially between thefront and rear attachment zone, liquid distribution in the transversedirection is enabled and/or improved such that liquid is able to “cross”the attachments zones and/or resulting channels to flow from the firstlongitudinal portion and the second longitudinal portion. This may beparticularly useful in situations wherein liquid insults are received ata longitudinal portion, e.g. near one of the longitudinal edges. In suchsituations, provided attachments zones may block liquid from flowingtransversally through the absorbent core, which leads to only alongitudinal portion of the absorbent core being used to absorb theliquid, which may cause leakage since the amount of absorbent materialwithin said one longitudinal portion is limited. However, by providing abridging zone between a front an rear attachment zone, interconnectingtwo longitudinal portions of the absorbent core, liquid is enabled toflow from one longitudinal portion through the bridging zone, to aneighboring longitudinal portion. In this manner, liquid can reach theabsorbent material within the neighboring longitudinal portion and maybe absorbed there. In other words, by providing at least one bridgingzone an available liquid absorbing capacity is increased, especially inthe transverse direction of the absorbent core. Furthermore, overallliquid intake by the absorbent core is faster as a result.

Also, the use of at least one bridging zone can improve the structureand integrity of the absorbent article. For example, the use of at leastone bridging zone may improve the formation of a tub-shape upon wettingof the absorbent article.

According to an embodiment the bridging zone allows a liquid flowbetween the first longitudinal portion and the second longitudinalportion by capillary action. In this manner, liquid can flow through theabsorbent material of the bridging zone without being obstructed andmove between and/or beyond and/or throughout the front and/or rearattachment zone(s). By providing at least one front attachment zone andat least one rear attachment as defined above channels are created whenthe absorbent core is wetted. By providing a bridging zone, e.g. acapillary bridging zone, between the front and rear attachment zone,liquid taken up in absorbent material near a first side edge may migrateby capillary action in the direction of a second side edge. In otherwords, the liquid is on the one hand distributed by the channels and onthe other hand allowed to migrate through the absorbent material fromone side edge to the other side edge. This is advantageous, especiallywhen a person wearing the absorbent article is lying down sideways.Indeed, when lying down the liquid may e.g. flow towards one side edgeby gravity. This will cause a swelling of the absorbent material nearthat side edge, and the capillary bridge will allow the liquid tomigrate towards the other side edge, in a transverse direction of theabsorbent core, independently of the orientation of the absorbentarticle. The bridging zone enables liquid flow opposite to the forces ofgravity, when a wearer of the absorbent article is lying down sideways.The presence of the bridging zone will prevent that liquid flow from onelongitudinal portion to another longitudinal portion is blocked byattachments zones and/or channels positioned between and/or in thelongitudinal portions. On the other hand the channels will be able toprovide for a fast liquid distribution in a longitudinal direction ofthe absorbent core.

Preferably, the capillary bridging zone extends between the first frontattachment zone and the first rear attachment zone, such that uponwetting of the absorbent material, a front and rear channel are createdat said first front and rear attachment zone, respectively, wherein thecapillary bridging zone extends between said front and rear channel. Inthat manner, after channel formation upon wetting, liquid can stillflow, e.g. by capillary action, between the first rear and frontattachment zone. It is noted that the capillary bridging zone maycomprise temporary or semi-permanent attachment zones which loosen uponwetting, whilst the first front attachment zone and the first rearattachment zone remain attached upon wetting. Preferably, a minimumdistance between the first front attachment zone and the first rearattachment zone is preferably larger than 3 mm, more preferably largerthan 5 mm, even more preferably larger than 8 mm. In that way asufficient flow can be guaranteed. This minimum distance (which isrelated to the capillary flow) may be varied depending on the size ofthe absorbent article.

According to an embodiment the bridging zone allows a liquid flowbetween the first longitudinal portion and the second longitudinalportion by mass flow. In this manner, liquid can benefit from channelsformed by permanent and/or semi-permanent attachment zones to flowthrough the bridging zone and to move between and/or beyond and/orthroughout the front and/or rear attachment zone(s).

According to a further embodiment, absorption capacity of the absorbentcore may benefit from both capillary action and mass flow of liquid inorder to enable liquid to be distributed quickly and adequately, forexample when the bridging zone comprises one or more semi-permanentattachments. In reaction to a first liquid insult the liquid will bedistributed by mass flow by means of the channel(s) formed at thesemi-permanent attachment(s). However, in reaction to further liquidinsults, the semi-permanent attachment(s) will release, loosen and/ordissolve which will lead to the bridging zone allowing the liquid topass through by capillary action. In other words, the bridging zone maycomprise a (semi-)permanent attachment in a first stage of wetting, andmay comprise substantially no attachments in a further stage of wetting.

According to an embodiment, the at least one bridging zone issubstantially free of attachments. In this manner, the bridging zone isformed in both a dry and a wet state of the absorbent core. Noobstructions are present within the bridging zone such that liquid canflow or travel via the bridging zone from one longitudinal portion to aneighboring longitudinal portion.

According to an embodiment the at least one bridging zone comprises atleast one semi-permanent attachment. In this manner, the bridging zonecomprises one or more attachments in a dry state of the absorbent core.This may allow liquid to be distributed via corresponding channelsformed at the one or more attachments, during a first liquid insult. Inother words, liquid may flow through the bridging zone by mass flow.However, the bridging zone is transformed in a wet state of theabsorbent core when the semi-permanent attachments are loosened becauseof the swelling of nearby absorbent material. When liquid is absorbed bythe absorbent core in proximity of the semi-permanent attachments, thesemi-permanent attachments will be released, such that no obstructionsare present within the bridging zone such that liquid can flow or travelvia the bridging zone from one longitudinal portion to a neighboringlongitudinal portion via capillary action.

According to an embodiment the at least one bridging zone comprisesfluff fibers. In this manner, the bridging zone is provided in both adry and a wet state of the absorbent core such that liquid can flow ortravel via the fluff fibers from one longitudinal portion to aneighboring longitudinal portion.

According to an embodiment the at least one bridging zone comprises atleast one strip of airlaid material. In this manner, the bridging zoneis provided in both a dry and a wet state of the absorbent core. Noobstructions are present within airlaid material such that liquid canflow or travel via the airlaid material from one longitudinal portion toa neighboring longitudinal portion. According to an embodiment a minimalwidth of the bridging zone is at least 5 mm, preferably at least 10 mmand more preferably at least 15 mm. In this manner, a sufficient widthis available to allow liquid to flow and/or travel through the bridgingzone. The minimal width of the bridging zone is the smallest distancebetween the front attachment zone and the rear attachment zone betweenwhich liquid is allowed to flow.

According to an embodiment the front attachment zone and the rearattachment zone are continuous attachment zones and have a length, seenin the longitudinal direction, of at least 30 mm, preferably at least 40mm and more preferably at least 50 mm. In this manner, by providingcontinuous attachment zones with a suitable length, a fast and adequatedistribution of liquid in the longitudinal direction of the absorbentcore is achieved, while enabling a fast and adequate distribution ofliquid in the transverse direction of the absorbent core via thebridging zone(s) between the front attachment zone and the rearattachment zone.

According to an embodiment the front attachment zone and rear attachmentzone extend in the longitudinal direction of the absorbent core; and/orwherein an angle between the front attachment zone and the longitudinaldirection of the absorbent core and an angle between the rear attachmentzone and the longitudinal direction of the absorbent core is smallerthan 10°, preferably smaller than 5°. In this manner, by providing frontan rear attachment zones which extend in a substantially longitudinaldirection of the absorbent core, a fast and adequate distribution ofliquid in the longitudinal direction of the absorbent core is achieved,while enabling a fast and adequate distribution of liquid in thetransverse direction of the absorbent core via the bridging zone(s)between the front attachment zone(s) and the rear attachment zone(s).

According to an embodiment the plurality of attachment zones furthercomprises a second front attachment zone and/or a second rear attachmentzone, wherein the at least one bridging zone extends between, on the onehand the first and/or second front attachment zones and, on the otherhand the first and/or second rear attachment zones.

According to an embodiment said first and second front attachment zoneextend next to each other from a crotch region in the direction of thefirst transverse edge. In this manner, by providing front attachmentzones which extend in a substantially longitudinal direction of theabsorbent core, a fast and adequate distribution of liquid in thelongitudinal direction of the absorbent core is achieved, while enablinga fast and adequate distribution of liquid in the transverse directionof the absorbent core via the bridging zone(s) between the frontattachment zone(s) and the rear attachment zone(s). According to anembodiment said first and second rear attachment zone extend next toeach other from a crotch region in the direction of the secondtransverse edge. In this manner, by providing rear attachment zoneswhich extend in a substantially longitudinal direction of the absorbentcore, a fast and adequate distribution of liquid in the longitudinaldirection of the absorbent core is achieved, while enabling a fast andadequate distribution of liquid in the transverse direction of theabsorbent core via the bridging zone(s) between the front attachmentzone(s) and the rear attachment zone(s).

According to an embodiment a distance between said first and secondfront attachment zone is larger than a distance between said first andsecond rear attachment zone. In this manner, a surface of absorbentmaterial extending between the first and second front attachment zone isincreased. By having a broader region of absorbent material located nearthe front part of the absorbent core, the absorbent core is especiallysuited for incorporation in absorbent articles for male users, sincemale users typically produce liquid insults closer to a front portion ofthe absorbent core as compared to liquid insults produced by femaleusers.

According to an embodiment a distance between said first and second rearattachment zone is larger than a distance between said first and secondfront attachment zone. In this manner, a surface of absorbent materialextending between the first and second rear attachment zone isincreased. By having a broader region of absorbent material located nearthe central/rear part of the absorbent core, the absorbent core isespecially suited for incorporation in absorbent articles for femaleusers, since female users typically produce liquid insults closer to acentral/rear portion of the absorbent core as compared to liquid insultsproduced by male users.

The skilled person will understand that the hereinabove describedtechnical considerations and advantages for absorbent articleembodiments also apply to the described absorbent core embodimentdescribed below, mutatis mutandis.

According to a further aspect there is provided an absorbent corecomprising an absorbent material between a top core wrap sheet and aback core wrap sheet, said absorbent core having a first and secondlongitudinal edge and a first and second transverse edge. The absorbentcore is provided with a plurality of attachment zones comprising atleast one front attachment zone and at least one rear attachment zoneand with at least one bridging zone extending at least partially betweensaid front and rear attachment zone, wherein the at least one frontattachment zone and at least one rear attachment zone, when projected ona longitudinal direction of the absorbent core, do not overlap oroverlap only partially; and the bridging zone extends from a firstlongitudinal portion of the absorbent core to a second longitudinalportion of the absorbent core. The first longitudinal portion is definedbetween the first longitudinal edge and a longitudinal center axis ofthe absorbent core and the second longitudinal portion is definedbetween the second longitudinal edge and the longitudinal center axis ofthe absorbent core, such that upon wetting of the absorbent material, afront and rear channel are created at said front and rear attachmentzone, respectively, wherein the bridging zone allows a liquid flowbetween the first longitudinal portion and the second longitudinalportion.

Aspects—4 or 3 Attachment Zones

According to an aspect of the invention there is provided an absorbentarticle comprising a liquid pervious topsheet, a liquid imperviousbacksheet, and an absorbent core comprising an absorbent materialbetween a top core wrap sheet and a back core wrap sheet. The absorbentcore is positioned in between the topsheet and the backsheet. Theabsorbent core has a first and second longitudinal edge and a first andsecond transverse edge. The absorbent core has a first portion and asecond portion on either side of a transverse crotch line. The absorbentcore is provided with a plurality of attachment zones where the top corewrap sheet is attached to the back core wrap sheet, said plurality ofattachment zones comprising at least

-   -   a first and a second elongate attachment zone extending next        each other, at least in the first portion of the absorbent core        in the direction of the first transverse edge, and    -   a third and a fourth elongate attachment zone extending next to        each other, at least in the second portion of the absorbent        core, in the direction of the second transverse edge.

Measured in a transverse direction, a first maximum distance between thefirst and the second attachment zone is bigger than a second maximumdistance between the third and the fourth attachment zone.

It is noted that the first transverse edge may be a front edge or a rearedge depending on the desired use of the absorbent article. Similarly,the first portion may be a front portion or a rear portion depending onthe desired use of the absorbent article. By having a different distancebetween the attachment zones in the front portion and in the rearportion, it is possible to tailor the absorbent article to the wearer.For example, for a male person the maximum distance may be larger in thefront portion than in the rear portion, whilst for a female person themaximum distance may be larger in the rear portion than in the frontportion. Further it is possible to optimize the difference between thefront and the rear portion for obtaining an unisex absorbent article.

Also, by having a different distance between the attachment zones in thefront portion and in the rear portion, the absorbent article can bebetter tailored to the needs of the wearer, wherein any one or more ofthe following may be taken into account: age, weight, type of bodilyexudates (urine, stool, etc.), pelvis size, etc. Not only for babydiapers but also for adult incontinence absorbent articles, the liquidabsorption and management properties can be significantly improved inthat manner.

According to another aspect of the invention there is provided anabsorbent article comprising a liquid pervious topsheet, a liquidimpervious backsheet, and an absorbent core comprising an absorbentmaterial between a top core wrap sheet and a back core wrap sheet. Theabsorbent core is positioned in between said topsheet and saidbacksheet. The absorbent core has a first and second longitudinal edgeand a first and second transverse edge. The absorbent core is providedwith a plurality of attachment zones where the top core wrap sheet isattached to the back core wrap sheet, said plurality of attachment zonescomprising at least

-   -   a first and a second attachment zone extending next to each        other from a crotch region in the direction of the first        transverse edge, and    -   a third attachment zone extending from the crotch region in the        direction of the second transverse edge, wherein seen in a        projection on a transverse direction the third attachment zone        is located between the first and the second attachment zone.

It is noted that the first transverse edge may be a front edge or a rearedge depending on the desired use of the absorbent article. By having afirst and a second attachment zone in the front or rear portion and athird attachment zone in the rear or front portion, respectively, saidthird attachment zone being such that it is between the first and thesecond attachment zone, seen in a projection as defined above, it ispossible to tailor the absorbent article to the wearer. For example, fora male person the first and second attachment zone may be in the frontportion and the third attachment zone may be in the rear portion, whilstfor a female person the first and second attachment zone may be in therear portion and the third attachment zone in the front portion. Furtherit is possible to optimize the difference between the front and the rearportion for obtaining an unisex absorbent article.

For an embodiment with a third and fourth attachment zone, the firstdistance between the first and the second attachment zone may be atleast 5%, preferably at least 10% bigger, even more preferably at least20% bigger than a second distance between the third and the fourthattachment zone. This difference may be optimized in function of thedesired used. For example, for male persons the difference may bebigger.

In an embodiment which is preferred for a male person, the first and thesecond elongate attachment zone may each have a front end adjacent toabsorbent material and a rear end adjacent to absorbent material or onthe transverse crotch line. And the third and the fourth elongateattachment zone may each have a rear end adjacent to absorbent materialand a front end adjacent to absorbent material or on the transversecrotch line (L). It is noted that the first attachment zone may beconnected to the third attachment zone: in that case the rear end of thefirst attachment zone and the front end of the third attachment zonewill be on the transverse crotch line. Similarly, the second attachmentzone may be connected to the fourth attachment zone: in that case therear end of the second attachment zone and the front end of the fourthattachment zone will be on the transverse crotch line.

In an embodiment which is preferred for a female person, the first andthe second elongate attachment zone may each have a rear end adjacent toabsorbent material and a front end adjacent to absorbent material or onthe transverse crotch line. And the third and the fourth elongateattachment zone may each have a front end adjacent to absorbent materialand a rear end adjacent to absorbent material or on the transversecrotch line (L). It is noted that the first attachment zone may beconnected to the third attachment zone: in that case the front end ofthe first attachment zone and the rear end of the third attachment zonewill be on the transverse crotch line. Similarly, the second attachmentzone may be connected to the fourth attachment zone: in that case thefront end of the second attachment zone and the rear end of the fourthattachment zone will be on the transverse crotch line.

For an embodiment with a third central attachment zone which ispreferred for a male person, the first and the second elongateattachment zone may each have a front end adjacent to absorbent materialand a rear end adjacent to absorbent material or on the transversecrotch line. And the third elongate attachment zone may have a rear endadjacent to absorbent material and a front end adjacent to absorbentmaterial or on the transverse crotch line (L). It is noted that thefirst attachment zone may be connected to the third attachment zone: inthat case the rear end of the first attachment zone and the front end ofthe third attachment zone will be on the transverse crotch line.Similarly, the second attachment zone may be connected to the thirdattachment zone: in that case the rear end of the second attachment zoneand the front end of the third attachment zone will be on the transversecrotch line.

For an embodiment with a central third attachment zone, which ispreferred for a female person, the first and the second elongateattachment zone may each have a rear end adjacent to absorbent materialand a front end adjacent to absorbent material or on the transversecrotch line. And the third elongate attachment zone may have a front endadjacent to absorbent material and a rear end adjacent to absorbentmaterial or on the transverse crotch line (L). It is noted that thefirst attachment zone may be connected to the third attachment zone: inthat case the front end of the first attachment zone and the rear end ofthe third attachment zone will be on the transverse crotch line.Similarly, the second attachment zone may be connected to the thirdattachment zone: in that case the front end of the second attachmentzone and the rear end of the third attachment zone will be on thetransverse crotch line.

For an embodiment with a third and fourth attachment zone, seen in aprojection on the longitudinal direction of the absorbent core, thefirst and the second attachment zone may extend over a length which isless than the length of the third and fourth attachment zone. To fitbetter to the body the third and fourth attachment zones which arecloser to each other may be longer to extend over a longer part of thecrotch region, for example the third and fourth attachment zones mayextend both in the first and the second portion of the absorbent core.Preferably, the first and the second attachment zone extend over alength which is at least 5% less, more preferably at least 10% less thanthe length of the third and fourth attachment zone. Preferably the firstand the second attachment zone extend over a length which is at least25%, more preferably at least 35%, even more preferably at least 45% ofthe length of the third and fourth attachment zone.

For an embodiment with a central third attachment zone, seen in aprojection on the longitudinal direction of the absorbent core, thefirst and the second attachment zone may extend over a length which isless than the length of the third attachment zone. To fit better to thebody the third attachment zone may be longer to extend over a longerpart of the crotch region, for example the third attachment zone mayextend both in the first and the second portion of the absorbent core.

Preferably, the first and the second attachment zone extend over alength which is at least 5% less, more preferably at least 10% less thanthe length of the third attachment zone. Preferably the first and thesecond attachment zone extend over a length which is at least 25%, morepreferably at least 35%, even more preferably at least 45% of the lengthof the third attachment zone.

In preferred embodiments, especially suitable for male persons, thefirst transverse edge may be a front edge intended to be positioned at afront side of a person, and the second transverse edge may be a rearedge intended to be positioned at a rear side of a person; wherein thefirst portion of the absorbent core is a front portion and the secondportion is a rear portion.

In preferred embodiments, especially suitable for female persons, thefirst transverse edge may be a rear edge intended to be positioned at arear side of a person, and the second transverse edge may be a frontedge intended to be positioned at a front side of a person; wherein thefirst portion of the absorbent core is a rear portion and the secondportion is a front portion.

The first attachment zone and the second attachment zone may be arrangedsymmetrically with respect to a longitudinal center axis of theabsorbent core extending between the first and second transverse edge.Since the body is more or less symmetrical this is usually preferred.

The distance between the first and the second attachment zone may bebetween 15 and 70% of the width of the absorbent core, more preferablybetween 20 and 50%. For example, the distance between the first and thesecond attachment zone may be between 10 mm and 100 mm, more preferablybetween 20 mm and 80 mm, preferably between 30 mm and 70 mm.

The distance between the third and the fourth attachment zone may bebetween 5 and 60% of the width of the absorbent core, more preferablybetween 10 and 40%. For example, the distance between the third and thefourth attachment zone may be between 5 mm and 60 mm, more preferablybetween 10 mm and 50 mm, even more preferably between 15 mm and 40 mm.The length of the first and the second attachment zone may be largerthan 5% of the length of the absorbent core; preferably larger than 10%,more preferably larger than 15%. e.g. larger than 20%. Similarly, thelength of the third and the fourth attachment zone may be larger than 5%of the length of the absorbent core; preferably larger than 10%, morepreferably larger than 15%. e.g. larger than 20%. Also, for anembodiment with a third central attachment zone, the length of the thirdattachment zone may be larger than 5% of the length of the absorbentcore; preferably larger than 10%, more preferably larger than 15%, e.g.larger than 20%.

The length of the third and the fourth attachment zone may be largerthan the length of the first and the second attachment zone, preferablyat least 10% larger, more preferably at least 20% larger. In a possibleembodiment, seen in a projection on a longitudinal direction of theabsorbent article, a projection of the first and second attachment zonedoes not overlap with a projection of the third and fourth attachmentzone. However, in other embodiments there may be a partial or even afull overlap. For example, the third and fourth attachment zone mayextend in between the first and second attachment zone.

In a possible embodiment with a central third attachment zone, seen in aprojection on a longitudinal direction of the absorbent article, aprojection of the first and second attachment zone does not overlap witha projection of the third attachment zone. However, in other embodimentsthere may be a partial or even a full overlap. For example, the thirdattachment zone may extend in between the first and second attachmentzone.

In a possible embodiment the first attachment zone may be separated fromthe third attachment zone by absorbent material, and the secondattachment zone may be separated from the fourth attachment zone byabsorbent material. In that manner a capillary bridge is created betweenthe first and second attachment zones on the one hand and the third andfourth attachment zones on the other hand. In an exemplary embodiment aminimum distance between an end on the first attachment zone and an endof the third attachment zone is at least 1% of the length of theabsorbent core, preferably at least 2%. Preferably this distance issmaller than 50% of the length of the absorbent core, more preferablysmaller than 20%. The same may apply for a minimum distance between thesecond and fourth attachment zone.

In another possible embodiment the first attachment zone may beconnected to the third attachment zone through a first semi-permanentattachment zone and the second attachment zone may be connected to thefourth attachment zone through a second semi-permanent attachment zone.Such semi-permanent attachment zones are configured to be detached uponwetting, so that liquid can flow in a transverse direction through theabsorbent material of the absorbent core.

In a possible embodiment one or more permanent or semi-permanenttransverse attachment zones may be provided to further improve theliquid distribution in the transverse direction.

Preferably, the first, second, third and fourth attachment zones arepermanent attachment zones which remain attached upon wetting. Also, inan embodiment with a central third attachment zone, preferably thefirst, second, and third attachment zones are permanent attachment zoneswhich remain attached upon wetting.

The length of the first and the second attachment zone may be largerthan 30 mm, preferably larger than 40 mm, more preferably larger than 50mm. The length of the third and the fourth attachment zone may be largerthan 30 mm, preferably larger than 40 mm, more preferably larger than 50mm. The first and second attachment extend, seen in the transversedirection of the absorbent core, over the transverse distance which maybe at least 1 mm, preferably at least 3 mm, more preferably at least 4mm, even more preferably at least 5 mm, most preferably at least 6 mm.

The first attachment zone and the second attachment zone may besubstantially parallel and extend in a longitudinal direction of theabsorbent core; or wherein an angle between the first attachment zoneand a longitudinal direction of the absorbent core and an angle betweenthe second attachment zone and the longitudinal direction of theabsorbent core may be smaller than 5°.

The third attachment zone and the fourth attachment zone may besubstantially parallel and extend in a longitudinal direction of theabsorbent core; or an angle between the third attachment zone and alongitudinal direction of the absorbent core and an angle between thefourth attachment zone and the longitudinal direction of the absorbentcore may be smaller than 5°. Also, in the embodiment with a centralthird attachment zone, the third attachment zone may extend in alongitudinal direction of the absorbent core; or an angle between thethird attachment zone and a longitudinal direction of the absorbent coremay be smaller than 5°.

Seen in a projection on a longitudinal direction of the absorbent core,the plurality of attachment zones together may cover at least 30%,preferably at least 40% of a length of the absorbent core. In yet otherembodiments which are suitable for both male and female persons(unisex), the difference between the first distance and the seconddistance may be less than 20% of the width of the absorbent article,preferably less than 15%, e.g. between 10 and 15%. In an exemplaryembodiment the first distance may be less than 10%, e.g. between 0 and8% or between 1 and 5%, wherein the width is measured in the transversedirection of the absorbent core.

Aspects—5 Zones

According to an aspect of the invention there is provided an absorbentarticle comprising a liquid pervious topsheet, a liquid imperviousbacksheet, and an absorbent core comprising an absorbent materialbetween a top core wrap sheet and a back core wrap sheet, said absorbentcore being positioned in between said topsheet and said backsheet. It isnoted that the top core wrap sheet and the bottom core wrap sheet may beformed as one integral sheet or may comprise separate portions aroundthe absorbent material. The absorbent core has a first and second sideedge, a front edge and a rear edge. The absorbent core is provided witha plurality of attachment zones where the top core wrap sheet isattached to the back core wrap sheet, and where substantially noabsorbent material is present. Seen in a longitudinal direction of theabsorbent article, looking from the front edge to the rear edge, theabsorbent core comprises subsequently a first, second, third, fourth andfifth zone. The absorbent core comprises a front portion extendingbetween the front edge and a transverse crotch line of the absorbentcore, and a rear portion extending between the rear edge and thetransverse crotch line of the absorbent core. The first, second andthird zone extend in the front portion of the absorbent core and thefourth and fifth zone extend in the rear portion.

Preferably, in the first and fifth zone substantially no permanentattachment zones with a liquid guidance or distribution function arepresent. In other words, the first and fifth zones may comprise smalllocal attachment points provided for other reasons that liquiddistribution management.

The second zone comprises at least a first elongate front attachmentzone of the plurality of attachment zones, said first front attachmentzone extending from an edge of the first zone in the direction of thethird zone.

At least the fourth zone comprises at least a first rear elongateattachment zone of the plurality of attachment zones, said first rearattachment zone extending from an edge of the fifth zone in thedirection of the third zone.

Preferably at least one of said second, third and fourth zone comprisesa bridging zone (B) allowing a liquid flow between the first and thesecond side edge by capillary action through the absorbent materialand/or by mass flow. It is noted that the liquid path through thebridging zone may be any path going from an area near the first sideedge to an area near the second edge. Preferably the distance betweenthe transverse crotch line and the transverse center line passingthrough the middle of the core is less than 10% of the length of thecore.

It is noted that the first rear attachment zone may extend in the thirdzone, i.e. in the front portion of the absorbent core.

It is noted that the first front attachment zone may extend in the thirdand/or the fourth zone, i.e. in the rear portion of the absorbent core.

By providing at least one elongate front attachment zone and at leastone elongate rear attachment as defined above channels are created whenthe absorbent core is wetted. By providing a bridging zone in at leastone of the second, third and fourth zone, notwithstanding the creationof a channel, liquid taken up in absorbent material near the first sideedge may migrate by capillary action and/or mass flow in the directionof the second side edge. In other words, the liquid is on the one handdistributed by the channels formed by the at least one front attachmentzone and at least one rear attachment zone, and on the other handallowed to be transported from one side edge to the other side edge bycapillary action and/or by mass flow via the bridging zone. This isadvantageous, especially when a person wearing the absorbent article islying down on its side. Indeed, when lying down the liquid may flowtowards one side edge by gravity. This will cause a swelling of theabsorbent material near that side edge, and the bridging zone will allowthe liquid to flow towards the other side edge against the gravity forceby capillary action. On the other hand the channels will be able toprovide for a fast liquid distribution through the second, third andfourth zone.

Preferably, the bridging zone extends between the first front attachmentzone and the first rear attachment zone, such that upon wetting of theabsorbent material, a front and rear channel are created at said firstfront and rear attachment zone, respectively, wherein the bridging zoneextends between said front and rear channel. In that manner, afterchannel formation upon wetting, liquid can still flow by capillaryaction and/or mass flow between the first rear and front attachmentzone. It is noted that the bridging zone may comprise secondarytemporary attachment zones which loosen upon wetting, whilst the firstfront attachment zone and the first rear attachment zone remain attachedupon wetting. Also the bridging zone may comprise attachment zonesextending between the first side edge and the second side edge topromote a mass flow action between an area near the first side edge toan area near the second side edge, wherein said areas are located atopposite sides of the first front/rear attachment zone. It is noted thatthe liquid path through the bridging zone may be any path going from anarea near the first side edge to an area near the second edge. It may bea straight transverse zone, but it may also be a curved zone, or apartially straight and partially curved zone. Preferably, a minimumdistance between the first front attachment zone and the first rearattachment zone is larger than 3 mm, more preferably larger than 5 mm,even more preferably larger than 8 mm. In that way a sufficient flow canbe guaranteed. This minimum distance (which is related to the capillaryflow and/or mass flow) may be varied depending on the size of theabsorbent article. In a preferred embodiment the bridging zone isconfigured to cause a capillary flow so that a flow against the gravityforce is possible.

In an advantageous embodiment the first rear elongate attachment zoneextends into the third zone. In that manner a continuous channel isformed between the front and the rear portion of the absorbent core.

Preferably, the first zone extends over a length corresponding with atleast 5%, more preferably at least 10% of the length of the absorbentcore seen in the longitudinal direction.

Preferably, the fifth zone extends over a length corresponding with atleast 10% of the length of the absorbent core seen in the longitudinaldirection, preferably at least 20%, more preferably at least 25%. Inthat manner the absorbent material in the first zone and the fifth zonewill swell upon wetting and created bands at both sides of the crotchregion. Such bands will create a barrier such that it is more difficultfor any liquid in the crotch region to flow out of the absorbent core.

Preferably, the second, the third and/or the fourth zone each extendsover a length corresponding with at least 10% of the length of theabsorbent core, seen in the longitudinal direction, preferably at least15%. More preferably the front and rear attachment zone, when projectedon the longitudinal direction extend over at least 70%, more preferablyat least 80% of the total length of the second, the third and/or thefourth zone. In that manner a good channel creation with sufficientliquid distribution through the absorbent core is achieved.

Preferably the first front attachment zone extends in a longitudinaldirection of the absorbent core; or an angle between the first frontattachment zone and a longitudinal direction of the absorbent core maybe smaller than 5°.

Preferably the first rear attachment zone extends in a longitudinaldirection of the absorbent core; or an angle between the first rearattachment zone and a longitudinal direction of the absorbent core maybe smaller than 5°.

Preferably, the length of the first front attachment zone is larger than5% of the length of the absorbent core; preferably larger than 10%, morepreferably larger than 15%; and/or wherein the length of the first rearattachment zone is larger than 5% of the length of the absorbent core,preferably larger than 10%, more preferably larger than 15%. Preferablythe length of the first front attachment zone is at least 10%, morepreferably at least 25%, even more preferably at least 35%, or even atleast 50 or 75% of the length of the first rear attachment zone.Alternatively, the length of the first rear attachment zone is at least10%, more preferably at least 25%, even more preferably at least 35%, oreven at least 50 or 75% of the length of the first front attachmentzone.

In an exemplary embodiment the second zone comprises a second frontattachment zone extending next to the first front attachment zone, seenin the longitudinal direction. Preferably the first front attachmentzone and the second front attachment zone are arranged symmetricallywith respect to a longitudinal center line of the absorbent core.Preferably the distance between the first and the second frontattachment zone is between 20 mm and 70 mm, more preferably between 30mm and 60 mm, even more preferably between 40 mm and 55 mm. Preferablythe distance between the first and the second front attachment zone isbetween 15 and 70% of the width of the absorbent core, more preferablybetween 20 and 50%. Especially for male persons, this distance ispreferably sufficiently large such that urine is captured mainly in thearea between the first front attachment zone and the second frontattachment zone.

The first front attachment zone and the second front attachment zone maybe substantially parallel and may extend in a longitudinal direction ofthe absorbent core; or an angle between the first front attachment zoneand a longitudinal direction of the absorbent core and an angle betweenthe second front attachment zone and the longitudinal direction of theabsorbent core may be smaller than 5°. For example the first and secondfront attachment zones may diverge in the direction of the first zone.

In an exemplary embodiment the fourth zone comprises a second rearattachment zone extending next to the first rear attachment zone, seenin the longitudinal direction, said second rear attachment zoneextending preferably into the third zone. Preferably the first rearattachment zone and the second rear attachment zone are arrangedsymmetrically with respect to a longitudinal center line of theabsorbent core. Preferably the distance between the first and the secondrear attachment zone is between 10 mm and 50 mm, preferably between 15mm and 40 mm, more preferably between 20 mm and 30 mm. Preferably thedistance between the first and the second rear attachment zone isbetween 5 and 60% of the width of the absorbent core, more preferablybetween 10 and 40%. Preferably the first rear attachment zone and thesecond rear attachment zone are substantially parallel and extend in alongitudinal direction of the absorbent core; or an angle between thefirst rear attachment zone and a longitudinal direction of the absorbentcore and an angle between the second rear attachment zone and thelongitudinal direction of the absorbent core is smaller than 5°. Forexample the first and second rear attachment zones may diverge in thedirection of the fifth zone.

Preferably a first smallest distance (d12) between the first and thesecond front attachment zone is bigger than a second smallest distance(d34) between the first and the second rear attachment zone, morepreferably at least 10% bigger, even more preferably at least 15%bigger. In that manner the channels formed by the first and the secondrear attachment zone will be closer to each other in the center of thecrotch region making the absorbent article more agreeable to wear, alsowhen wetted, and will give the absorbent article a tub-shape whenwetted, see further. On the other hand the channels created by the firstand the second front attachment zone will be further away from eachother to obtain a good liquid distribution, especially for male persons.

Preferably, the first and the second front attachment zone extend in alongitudinal direction of the absorbent core over a length which is lessthan the length of the first and second rear attachment zone, morepreferably at least 10% less, even more preferably at least 15% less. Inthat manner the first and the second front attachment zone can extendfrom the fourth zone into the third zone such that the absorbent articlefits better to the body of the wearer.

Preferably, the bridging zone extends from a first portion of theabsorbent core, preferably in the second or third zone, to a secondportion of the absorbent core, preferably in the second or third zone,wherein the first portion is defined between the first side edge and alongitudinal center axis (CL) of the absorbent core and the secondportion is defined between the second side edge and the longitudinalcenter axis (CL) of the absorbent core.

Preferably, the length of the first front attachment zone is larger than30 mm, more preferably larger than 40 mm, even more preferably largerthan 50 mm.

Preferably, the length of the first rear attachment zone is larger than30 mm, more preferably larger than 40 mm, even more preferably largerthan 50 mm.

Preferably, said plurality of attachment zones are permanent attachmentzones which remain attached when wetted.

Preferably, said plurality of attachment zones extend, seen in thetransverse direction of the absorbent core, over the transverse distancewhich is at least 1 mm, preferably at least 3 mm, more preferably atleast 4 mm, even more preferably at least 5 mm, most preferably at least6 mm. In that manner the channels created upon wetting will besufficiently wide to cause a good liquid distribution.

In an exemplary embodiment, the bridging zone comprises one or moretemporary attachments which are configured to detach when wetted. Inthat manner, upon wetting the one or more temporary attachments mayfirst function to guide a mass flow of the liquid, whereupon, afterloosening a capillary flow through the absorbent material is madepossible. In a possible embodiment, the bridging zone comprises at leastone permanent attachment zone in a direction from the first to thesecond side edge, e.g. in a transverse direction.

Aspects—Connecting Attachment Zone (e.g. U-Shape, O-Shape)

According to an aspect of the invention there is provided an absorbentarticle comprising a liquid pervious topsheet, a liquid imperviousbacksheet, and an absorbent core comprising an absorbent materialbetween a top core wrap sheet and a back core wrap sheet. The absorbentcore is positioned in between said topsheet and said backsheet. Theabsorbent core has a first and second longitudinal edge and a front andrear transverse edge. The absorbent core is provided with a plurality ofattachment zones where the top core wrap sheet is attached to the backcore wrap sheet. The plurality of attachment zones comprises:

-   -   at least a first and a second elongate attachment zone, said        first and second elongate attachment zone extending next to each        other from a crotch region in the direction of the front and/or        rear transverse edge;    -   at least one connecting attachment zone connecting said first        attachment zone with said second attachment zone.

By providing a first and a second elongate attachment zone which areinterconnected by at least one connecting attachment zone, upon wettingof the absorbent core two elongate channels are created which areinterconnected by at least one interconnecting channel which is inliquid communication with the first and second elongate channel. In thatmanner, immediately after wetting, liquid can flow from the firstelongate channel to the second elongate channel and vice versa,improving the liquid distribution, whereupon the liquid can be absorbedby the absorbent material.

According to an exemplary embodiment the at least one connectingattachment zone comprises at least one of:

-   -   a front connecting attachment zone which connects a front end        portion of the first attachment zone to a corresponding front        end portion of the second attachment zone;    -   a rear connecting attachment zone which connects a rear end        portion of the first attachment zone to a corresponding rear end        portion of the second attachment zone.

In that manner a good distribution is obtained in the front portionand/or in the back portion. Especially for a male person, it may bedesirable to have a front connecting attachment zone.

The absorbent core has a transverse crotch line dividing the absorbentcore in a front portion and a rear portion on either side of thetransverse crotch line. Preferably, the front connecting attachment zoneis located in the front portion and/or the rear connecting attachmentzone is located in the rear portion.

In an exemplary embodiment a connecting attachment zone extendssubstantially in a transverse direction of the absorbent core. This maybe advantageous when the first and second elongate channel extendsubstantially parallel. In that manner an absorbent core is obtainedwhich may be substantially symmetrical with respect to a longitudinalcenter axis. In other symmetrical embodiments the connecting attachmentzone may be substantially V-shaped or U-shaped, wherein the V-shape orU-shape is arranged such that it is symmetrical with respect to thelongitudinal center axis of the absorbent core.

In an exemplary embodiment, upon wetting of the absorbent material, afirst and second channel are created at said first and second elongateattachment zone, respectively, and the first and second channel aredirectly connected to each other through the at least one connectingattachment zone; wherein a first, second, and at least one connectingchannel are created at said first, second, and at least one connectingattachment zone, respectively.

In a preferred embodiment the at least one connecting attachment zonecorresponds with at least one permanent attachment zone which remainsattached upon wetting, or at least one semi-permanent attachment zoneconfigured to release after having been in contact with liquid for apredetermined period of time, wherein said predetermined period of timeis preferably smaller than 30 s.

In an exemplary embodiment the at least one connecting attachment zonecomprises one or more straight portions, and/or one or more curvedportions.

In an exemplary embodiment the first attachment zone, the secondattachment zone, and the at least one connecting attachment zonecollectively form a substantially “U” shaped zone, or a substantially“V” shaped zone. A U-shape or V-shape provides for a good guidance ofthe liquid. Moreover, with a U-shaped attachment zone sharp angles maybe avoided further improving a good liquid transport from a firstelongate attachment zone (one leg) of the U-shaped attachment zone tothe second elongate attachment zone (the other leg) of the U-shapedattachment zone. Further, with a V-shape, liquid may be guided from e.g.a left and right front portion to a center portion in the crotch region.

In an exemplary embodiment, the first attachment zone, the secondattachment zone, and the at least one connecting attachment zonecollectively delimit a substantially enclosed region. For example, thesubstantially enclosed region may be a substantially “O” shaped region,or a substantially polygon shaped region, such as a substantiallyrectangular shaped region, a substantially triangular shaped region, adiamond shaped region, a substantially hexagonal shaped region. In thatmanner liquid can be distributed around the boundary of the enclosedregion, such that it can be absorbed from the entire boundary by theabsorbent material in the enclosed region and by the absorbent materialin a region surrounding the enclosed region.

In an exemplary embodiment, the first attachment zone and the secondattachment zone are substantially parallel and extend in a longitudinaldirection of the absorbent core. In another exemplary embodiment, anangle between the first attachment zone and a longitudinal direction ofthe absorbent core and an angle between the second attachment zone andthe longitudinal direction of the absorbent core is smaller than 5°.

In an exemplary embodiment, the plurality of attachment zones isarranged symmetrically with respect to a longitudinal center axis of theabsorbent core extending between the front and rear transverse edge.

In an exemplary embodiment, the largest distance between the first andthe second attachment zone in the transverse direction is between 15 and70% of the width of the absorbent core, more preferably between 20 and50%; wherein preferably the largest distance between the first and thesecond attachment zone in the transverse direction is between 10 mm and100 mm, more preferably between 20 mm and 80 mm, even more preferablybetween 30 mm and 70 mm.

In an exemplary embodiment, the first and second attachment zones arepermanent attachment zones which remain attached upon wetting, orsemi-permanent attachment zones configured to release after having beenin contact with liquid for a predetermined period of time, wherein saidpredetermined period of time is preferably smaller than 30 s.

The absorbent core has a first and second transverse edge, wherein thefirst edge may be the front edge or the rear edge, and the second edgemay be the rear edge or the front edge, respectively. The absorbent corehas a first portion and a second portion on either side of thetransverse crotch line. The first and the second elongate attachmentzone extend next to each other, at least in the first portion of theabsorbent core in the direction of the first transverse edge.

In a first possible embodiment, the plurality of attachment zones mayfurther comprise a third and a fourth elongate attachment zone extendingnext to each other, at least in the second portion of the absorbentcore, in the direction of the second transverse edge. Optionally thethird and fourth elongate attachment zone may be connected by aconnecting attachment zone.

Measured in a transverse direction, a first maximum distance between thefirst and the second attachment zone is preferably bigger than a secondmaximum distance between the third and the fourth attachment zone.

It is noted that the first transverse edge may be a front edge or a rearedge depending on the desired use of the absorbent article. Similarly,the first portion may be a front portion or a rear portion depending onthe desired use of the absorbent article. By having a different distancebetween the attachment zones in the front portion and in the rearportion, it is possible to tailor the absorbent article to the wearer.For example, for a male person the maximum distance may be larger in thefront portion than in the rear portion, whilst for a female person themaximum distance may be larger in the rear portion than in the frontportion. Further it is possible to optimize the difference between thefront and the rear portion for obtaining a unisex absorbent article.

In a second possible embodiment, the plurality of attachment zones mayfurther comprise a third attachment zone extending from the crotchregion in the direction of the second transverse edge, wherein seen in aprojection on a transverse direction the third attachment zone islocated between the first and the second attachment zone. By having afirst and a second attachment zone in the front or rear portion and athird attachment zone in the rear or front portion, respectively, saidthird attachment zone being such that it is between the first and thesecond attachment zone, seen in a projection as defined above, it ispossible to tailor the absorbent article to the wearer. For example, fora male person the first and second attachment zone may be in the frontportion and the third attachment zone may be in the rear portion, whilstfor a female person the first and second attachment zone may be in therear portion and the third attachment zone in the front portion. Furtherit is possible to optimize the difference between the front and the rearportion for obtaining a unisex absorbent article.

For an embodiment with a third and fourth attachment zone, the firstdistance between the first and the second attachment zone may be atleast 5%, preferably at least 10% bigger, even more preferably at least20% bigger than a second distance between the third and the fourthattachment zone. This difference may be optimized in function of thedesired used. For example, for male persons the difference may bebigger.

In an embodiment which is preferred for a male person, the first and thesecond elongate attachment zone may each have a front end adjacent toabsorbent material and a rear end adjacent to absorbent material or onthe transverse crotch line. And the third and the fourth elongateattachment zone may each have a rear end adjacent to absorbent materialand a front end adjacent to absorbent material or on the transversecrotch line (L). It is noted that the first attachment zone may beconnected to the third attachment zone: in that case the rear end of thefirst attachment zone and the front end of the third attachment zonewill be on the transverse crotch line. Similarly, the second attachmentzone may be connected to the fourth attachment zone: in that case therear end of the second attachment zone and the front end of the fourthattachment zone will be on the transverse crotch line.

In an embodiment which is preferred for a female person, the first andthe second elongate attachment zone may each have a rear end adjacent toabsorbent material and a front end adjacent to absorbent material or onthe transverse crotch line. And the third and the fourth elongateattachment zone may each have a front end adjacent to absorbent materialand a rear end adjacent to absorbent material or on the transversecrotch line (L). It is noted that the first attachment zone may beconnected to the third attachment zone: in that case the front end ofthe first attachment zone and the rear end of the third attachment zonewill be on the transverse crotch line. Similarly, the second attachmentzone may be connected to the fourth attachment zone: in that case thefront end of the second attachment zone and the rear end of the fourthattachment zone will be on the transverse crotch line.

For an embodiment with a central third attachment zone (instead of athird and fourth attachment zone) which is preferred for a male person,the first and the second elongate attachment zone may each have a frontend adjacent to absorbent material and a rear end adjacent to absorbentmaterial or on the transverse crotch line. And the third elongateattachment zone may have a rear end adjacent to absorbent material and afront end adjacent to absorbent material or on the transverse crotchline (L). It is noted that the first attachment zone may be connected tothe third attachment zone: in that case the rear end of the firstattachment zone and the front end of the third attachment zone will beon the transverse crotch line. Similarly, the second attachment zone maybe connected to the third attachment zone: in that case the rear end ofthe second attachment zone and the front end of the third attachmentzone will be on the transverse crotch line.

For an embodiment with a central third attachment zone which ispreferred for a female person, the first and the second elongateattachment zone may each have a rear end adjacent to absorbent materialand a front end adjacent to absorbent material or on the transversecrotch line. And the third elongate attachment zone may have a front endadjacent to absorbent material and a rear end adjacent to absorbentmaterial or on the transverse crotch line (L). It is noted that thefirst attachment zone may be connected to the third attachment zone: inthat case the front end of the first attachment zone and the rear end ofthe third attachment zone will be on the transverse crotch line.Similarly, the second attachment zone may be connected to the thirdattachment zone: in that case the front end of the second attachmentzone and the rear end of the third attachment zone will be on thetransverse crotch line.

For an embodiment with a third and fourth attachment zone, seen in aprojection on the longitudinal direction of the absorbent core, thefirst and the second attachment zone may extend over a length which isless than the length of the third and fourth attachment zone. To fitbetter to the body the third and fourth attachment zones which arecloser to each other may be longer to extend over a longer pan of thecrotch region, for example the third and fourth attachment zones mayextend both in the first and the second portion of the absorbent core.Preferably, the first and the second attachment zone extend over alength which is at least 5% less, more preferably at least 10% less thanthe length of the third and fourth attachment zone. Preferably the firstand the second attachment zone extend over a length which is at least25%, more preferably at least 35%, even more preferably at least 45% ofthe length of the third and fourth attachment zone.

For an embodiment with a third attachment zone, seen in a projection onthe longitudinal direction of the absorbent core, the first and thesecond attachment zone may extend over a length which is less than thelength of the third attachment zone. To fit better to the body the thirdattachment zone may be longer to extend over a longer part of the crotchregion, for example the third attachment zone may extend both in thefirst and the second portion of the absorbent core. Preferably, thefirst and the second attachment zone extend over a length which is atleast 5% less, more preferably at least 10% less than the length of thethird attachment zone. Preferably the first and the second attachmentzone extend over a length which is at least 25%, more preferably atleast 35%, even more preferably at least 45% of the length of the thirdattachment zone.

In preferred embodiments, especially suitable for male persons, thefirst transverse edge may be a front edge intended to be positioned at afront side of a person, and the second transverse edge may be a rearedge intended to be positioned at a rear side of a person; wherein thefirst portion of the absorbent core is a front portion and the secondportion is a rear portion.

In preferred embodiments, especially suitable for female persons, thefirst transverse edge may be a rear edge intended to be positioned at arear side of a person, and the second transverse edge may be a frontedge intended to be positioned at a front side of a person; wherein thefirst portion of the absorbent core is a rear portion and the secondportion is a front portion.

The distance between the first and the second attachment zone may bebetween 15 and 70% of the width of the absorbent core, more preferablybetween 20 and 50%. For example, the distance between the first and thesecond attachment zone may be between 10 mm and 100 mm, more preferablybetween 20 mm and 80 mm, preferably between 30 mm and 70 mm.

The distance between the third and the fourth attachment zone may bebetween 5 and 60% of the width of the absorbent core, more preferablybetween 10 and 40%. For example, the distance between the third and thefourth attachment zone may be between 5 mm and 60 mm, more preferablybetween 10 mm and 50 mm, even more preferably between 15 mm and 40 mm.The length of the first and the second attachment zone may be largerthan 5% of the length of the absorbent core; preferably larger than 10%,more preferably larger than 15%, e.g. larger than 20% or even largerthan 30% or 40% of the length of the absorbent core. Similarly, thelength of the third and the fourth attachment zone may be larger than 5%of the length of the absorbent core; preferably larger than 10%, morepreferably larger than 15%. e.g. larger than 20%. Also, for anembodiment with a central third attachment zone, the length of the thirdattachment zone may be larger than 5% of the length of the absorbentcore; preferably larger than 10%, more preferably larger than 15%, e.g.larger than 20%.

The length of the third and the fourth attachment zone may be largerthan the length of the first and the second attachment zone, preferablyat least 10% larger, more preferably at least 20% larger. In a possibleembodiment, seen in a projection on a longitudinal direction of theabsorbent article, a projection of the first and second attachment zonedoes not overlap with a projection of the third and fourth attachmentzone. However, in other embodiments there may be a partial or even afull overlap. For example, the third and fourth attachment zone mayextend in between the first and second attachment zone.

In a possible embodiment with a central third attachment zone, seen in aprojection on a longitudinal direction of the absorbent article, aprojection of the first and second attachment zone does not overlap witha projection of the third attachment zone. However, in other embodimentsthere may be a partial or even a full overlap. For example, the thirdattachment zone may extend in between the first and second attachmentzone.

In a possible embodiment the first attachment zone may be separated fromthe third attachment zone by absorbent material, and the secondattachment zone may be separated from the fourth attachment zone byabsorbent material. In that manner a capillary bridge is created betweenthe first and second attachment zones on the one hand and the third andfourth attachment zones on the other hand.

In another possible embodiment the first attachment zone may beconnected to the third attachment zone through a first semi-permanentattachment zone and the second attachment zone may be connected to thefourth attachment zone through a second semi-permanent attachment zone.Such semi-permanent attachment zones are configured to be detached uponwetting, so that liquid can flow in a transverse direction through theabsorbent material of the absorbent core.

Preferably, the first, second, third and fourth attachment zones arepermanent attachment zones which remain attached upon wetting. Also, inan embodiment without the fourth attachment zone, preferably the first,second, and third attachment zones are permanent attachment zones whichremain attached upon wetting.

The third attachment zone and the fourth attachment zone may besubstantially parallel and extend in a longitudinal direction of theabsorbent core; or an angle between the third attachment zone and alongitudinal direction of the absorbent core and an angle between thefourth attachment zone and the longitudinal direction of the absorbentcore may be smaller than 5°. Also, in the embodiment with a centralthird attachment zone, the third attachment zone may extend in alongitudinal direction of the absorbent core; or an angle between thethird attachment zone and a longitudinal direction of the absorbent coremay be smaller than 5.

In an exemplary embodiment, seen in a longitudinal direction of theabsorbent article, looking from the front edge to the rear edge, theabsorbent core comprises subsequently a first, second, third, fourth andfifth zone. The absorbent core comprises a front portion extendingbetween the front edge and a transverse crotch line of the absorbentcore, and a rear portion extending between the rear edge and thetransverse crotch line of the absorbent core. The first, second andthird zone extend in the front portion of the absorbent core and thefourth and fifth zone extend in the rear portion.

Preferably, the at least one connecting attachment zone connecting thefirst and second elongate attachment zone extend in the second, third orfourth zone.

More preferably, the second and/or third zone comprises at least onefront connecting attachment zone connecting a first elongate frontattachment zone and a second elongate front attachment zone; and/or thefourth zone comprises at least one rear connecting attachment zoneconnecting a first elongate rear attachment zone and a second elongaterear attachment zone.

Preferably, in the first and fifth zone substantially no permanentattachment zones with a liquid guidance or distribution function arepresent. In other words, the first and fifth zones may comprise smalllocal attachment points provided for other reasons that liquiddistribution management. Preferably, the second zone comprises at leasta first elongate front attachment zone of the plurality of attachmentzones, said first front attachment zone extending from an edge of thefirst zone in the direction of the third zone.

Preferably, at least the fourth zone comprises at least a first rearelongate attachment zone of the plurality of attachment zones, saidfirst rear attachment zone extending from an edge of the fifth zone inthe direction of the third zone.

Any of the features disclosed above for the “5zone” aspect may also beincluded in embodiments of the connecting attachment zone aspect.

Aspects—Crossing Point (e.g. V-Shape, X-Shape)

According to an aspect of the invention, there is provided an absorbentarticle comprising a liquid pervious topsheet, a liquid imperviousbacksheet, and an absorbent core comprising an absorbent materialbetween a top core wrap sheet and a back core wrap sheet. The absorbentcore is positioned in between the topsheet and the backsheet. Theabsorbent core has a first and second longitudinal edge and a first andsecond transverse edge. The absorbent core has a longitudinal centerline dividing the absorbent core in a first longitudinal portion and asecond longitudinal portion on either side of the longitudinal centerline, and a transverse crotch line dividing the absorbent core in afront portion and a rear portion on either side of the transverse crotchline. The absorbent core is provided with a plurality of attachmentzones where the top core wrap sheet is attached to the back core wrapsheet. The plurality of attachment zones comprises a first and secondelongate attachment zone, said first and second elongate attachment zoneextending next to each other from a crotch region in the direction ofthe first and/or second transverse edge. The first elongate attachmentzone crosses the longitudinal center line in a first crossing point,from the first longitudinal portion to the second longitudinal portion;and the second elongate attachment zone crosses the longitudinal centerline in a second crossing point, from the second longitudinal portion tothe first longitudinal portion. The first and second crossing point maybe the same point or a different point, and may be located in the frontportion or in the rear portion or on the transverse crotch line betweenconnecting the front portion to the rear portion.

By providing a first and a second elongate attachment zone which arecrossing the longitudinal center line, upon wetting of the absorbentcore two elongate channels are created. The first elongate channelextends from a first left position to a second right side, where thefirst left position is closer to the first transverse edge than thesecond right position. Similarly, second elongate channel extends from asecond right position to a first left position, where the second rightposition is closer to the first transverse edge than the first leftposition. In that manner, immediately after wetting, liquid is guided inthe first and/or second elongate channel from left to right and/or fromright to left, respectively, whilst flowing towards the crotch region oraway from the crotch region, improving the liquid distribution,whereupon the liquid can be absorbed by the absorbent material. Further,by making the first and second attachment zones cross the longitudinalcenter line, the zones may be longer compared to similar zones extendingparallel to the longitudinal center line, resulting in a larger liquiddistribution zone.

Preferably, the first and second crossing point correspond withsubstantially the same point located on the longitudinal center line. Inthat manner a connection between the first and the second attachmentzone is realized further enhancing the liquid distribution.

In another embodiment, the first and second crossing point may bedifferent points, and the first and the second attachment zone may crosseach other at a distance of the longitudinal center line. In such anembodiment third and fourth elongate attachment zone arrangedsymmetrically with respect to the first and second elongate attachmentzones may be provided, such that the first and second attachment zonecross each other at one side of the longitudinal center line and thethird and fourth attachment zone cross each other at another side of thelongitudinal center line.

Preferably, the first and/or second crossing point are located at adistance of the transverse crotch line. For example, the first and/orsecond crossing point may be located in a front portion. In that way theposition of the first and/or second can be optimized e.g. in function ofwhether the absorbent article is intended for a male or female person.However, in other embodiments, the first and/or second crossing pointmay be located on the transverse crotch line.

When at a distance of the transverse crotch line, preferably, thedistance between the first and/or second crossing point and thetransverse crotch line is larger than 1% of the length of the absorbentcore, preferably larger than 2%, even more preferably larger than 3%.

In certain embodiments with multiple first crossing points and multiplesecond crossing points may be provided, wherein these multiple firstcrossing points may be located a different distances of the transversecrotch line, e.g. two first crossing points, one in the front portionand one in the rear portion, and two second crossing points, one in thefront portion (optionally corresponding with the first crossing point inthe front portion), and one in the rear portion (optionallycorresponding with the first crossing point in the rear portion), seee.g. FIG. 15P.

Preferably, the first elongate attachment zone extends both in the frontportion and in the rear portion; and the second elongate attachment zoneextends both in the front portion and in the rear portion. In thatmanner a good liquid distribution from left to right and from front torear can be obtained.

Preferably, the first elongate attachment zone and the second elongateattachment zone are arranged symmetrically with respect to thelongitudinal center line of the absorbent core.

In an exemplary embodiment a maximum distance between the first and thesecond elongate attachment zone is between 15 and 70% of the width ofthe absorbent core, more preferably between 20 and 50%.

In an exemplary embodiment a maximum distance between the first and thesecond attachment zone in the front portion is different from a maximumdistance between the first and the second attachment zone in the rearportion. In that manner the liquid distribution zone may be betteradapted to the type of person wearing the absorbent article. Forexample, for a male person, a maximum distance between the distancebetween the first and the second attachment zone near a front transverseedge may be larger than a maximum distance between the first and thesecond attachment zone in a rear portion.

Preferably, the length of the first and second attachment zone is largerthan 10% of the length of the absorbent core, more preferably largerthan 30%, even more preferably larger than 50% In an exemplaryembodiment the plurality of attachment zones are permanent attachmentzones which remain attached when wetted. In certain embodiments, thefirst attachment zone may be connected to the second attachment zonethrough a semi-permanent attachment zone, preferably extending in asubstantially transverse direction.

In an exemplary embodiment at least one of said first and secondelongate attachment zone comprises a bridging zone (B) allowing a liquidflow between the first and the second longitudinal edge by capillaryaction through the absorbent material and/or by mass flow, such thatupon wetting of the absorbent material, a front and rear channel arecreated, wherein the bridging zone extends between said front and rearchannel; wherein a minimum distance between said front and rear channelis preferably larger than 3 mm more preferably larger than 5 mm.

In an exemplary embodiment, the first and second channel together form asubstantially X-shaped zone. Optionally the legs of the “X” may beinterrupted to create one or more bridging zones as defined above.

In an exemplary embodiment, the bridging zone extends from the firstlongitudinal portion of the absorbent core to the second longitudinalportion of the absorbent core; wherein optionally said bridging zonecomprises one or more temporary attachments between the top and backcore wrap sheet which are configured to detach when wetted; and/orwherein said bridging zone comprises at least one permanent attachmentzone in a direction from the first to the second side edge; and/orwherein said bridging zone comprises absorbent material.

According to an exemplary embodiment, the first and second transverseedge correspond with a front and rear transverse edge, and the pluralityof attachment zones further comprises at least one connecting attachmentzone connecting said first attachment zone with said second attachmentzone.

By providing a first and a second elongate attachment zone which areinterconnected by at least one connecting attachment zone, upon wettingof the absorbent core two elongate channels are created which areinterconnected by at least one interconnecting channel which is inliquid communication with the first and second elongate channel. In thatmanner, immediately after wetting, liquid can flow from the firstelongate channel to the second elongate channel and vice versa,improving the liquid distribution, whereupon the liquid can be absorbedby the absorbent material.

According to an exemplary embodiment the at least one connectingattachment zone comprises at least one of:

-   -   a front connecting attachment zone which connects a front end        portion of the first attachment zone to a corresponding front        end portion of the second attachment zone;    -   a rear connecting attachment zone which connects a rear end        portion of the first attachment zone to a corresponding rear end        portion of the second attachment zone.

In that manner a good distribution is obtained in the front portionand/or in the back portion. Especially for a male person, it may bedesirable to have a front connecting attachment zone. Preferably, thefront connecting attachment zone is located in the front portion and/orthe rear connecting attachment zone is located in the rear portion.

Other features disclosed above for the “connecting attachment” aspectmay be combined with embodiments of the “crossing point” aspect.

Features Applicable to all Aspects

Preferably, a distance between the transverse crotch line (asused/defined above) and a transverse center line extending perpendicularon the longitudinal direction of the absorbent core, through the middleof the absorbent core, is smaller than 10%, more preferably smaller than5% of the length of the absorbent core.

Preferably, the first and/or second and/or third and/or fourthattachment zone each extends, seen in the transverse direction of theabsorbent core, over the transverse distance which is at least 1 mm,preferably at least 3 mm, more preferably at least 4 mm, even morepreferably at least 5 mm, most preferably at least 6 mm.

The length of the first and the second attachment zone may be largerthan 30 mm, preferably larger than 40 mm, more preferably larger than 50mm. The length of the third and the fourth attachment zone may be largerthan 30 mm, preferably larger than 40 mm, more preferably larger than 50mm. In possible embodiments one or more permanent or semi-permanenttransverse attachment zones may be provided to further improve theliquid distribution in the transverse direction. In the first and secondattachment zone said top core wrap sheet may be attached to said backcore wrap sheet through permanent and semi-permanent attachmentportions, said semi-permanent portions may be configured to releaseafter having been in contact with liquid whilst said permanent portionsmay be configured not to release after having been in contact withliquid. In an exemplary embodiment, in a front and/or rear attachmentzone the top core wrap sheet is attached to the back core wrap sheetthrough permanent and semi-permanent attachment portions, saidsemi-permanent portions being configured to release after having been incontact with liquid whilst said permanent portions are configured not torelease after having been in contact with liquid. It is noted thatdifferent types of semi-permanent attachment portions may be used in thesame absorbent article so as to achieve a gradual loosening of theattachments upon wetting. This is described in detail in patentdocuments WO2012048879A1 and WO2012048878A1, which are included hereinby reference.

The absorbent material may comprise cellulosic fluff pulp and/orsuperabsorbent particles. The absorbent material may be substantiallyfluffless.

Preferably, substantially no absorbent material is present in theplurality of attachment zones. A position and/or shape of one or moreattachment zones may be indicated by means of a distinguishable colorand/or colored pattern. E.g., a position and/or shape of one or moreattachment zones may be indicated by means of a printed ink layer. Thedistinguishable color and/or colored pattern may be provided on at leastone of the topsheet, the top core wrap sheet, the backsheet and the backcore wrap sheet.

Preferably, the plurality of attachment zones cover together at least20%, preferably at least 30% more preferably at least 40%, morepreferably at least 50%, more preferably at least 60%, more preferablyat least 70%, more preferably 80% and more preferably at least 90% of atotal length of the absorbent core. The covered length may be realizedwith the first and second attachment zone alone, or with a combinationof a first and second attachment zone and one or more additionalattachment zones. For example, first and second adjacent longitudinalattachment zones together with third and fourth adjacent longitudinalattachment zones may extend over at least 30%, preferably at least 40%,preferably at least 50%, more preferably at least 6(0%, more preferablyat least 70%, more preferably 80% and more preferably at least 90% of atotal length of the absorbent core. This will allow a good distributionover the entire absorbent core as well as a good formation of thechannels and the tub-shape upon swelling of the absorbent core.

According to a preferred embodiment, outside of the plurality ofattachment zones the absorbent core has a maximum thickness; wherein thefirst and second attachment zone extend through at least 90% of themaximum thickness of the absorbent core, more preferably through 100% ofthe thickness of the absorbent core such that in the first and secondattachment zone substantially no absorbent material is present betweenthe top core wrap sheet and the back core wrap sheet. According to anexemplary embodiment the first attachment zone and the second attachmentzone are arranged symmetrically with respect to a longitudinal centerline of the absorbent core extending between the first and secondtransverse edge.

According to a preferred embodiment, the attachment between the top corewrap sheet and the back core wrap sheet is in any one or more of theattachment zones is any one of the following or a combination thereof:pressure bonding, thermal bonding, sonic bonding, chemical bonding,adhesive. The attachment may be a direct or indirect attachment. E.g, anadhesive and/or other intermediate material may be inserted between thetop core wrap sheet and the back core wrap sheet. For example, astructure or layer having no or less absorption capacity than theabsorbent material may be added in between the top core wrap sheet andthe back core wrap in the attachment area.

According to exemplary embodiment, the first and second attachment zoneeach have a bottom and a top, wherein the top core wrap sheet isattached to the back core wrap sheet at said bottom, at said top, orbetween said bottom and said top.

In embodiments of the invention the top core wrap sheet and the bottomcore wrap sheet may be formed as one integral sheet or may compriseseparate portions around the absorbent material.

The absorbent article may further comprise a wetness indicatorpreferably placed between two attachment zones and/or in one or moreattachment zones and/or between an attachment zone and an edge of theabsorbent core. The wetness indicator may change appearance whencontacted with liquid, e.g. wetness indicator may be configured togenerate a color change signal that changes appearance when contactedwith liquid. The wetness indicator may comprise a composition thatchanges appearance when contacted with liquid, in particular acomposition comprising a pH indicator and/or a water soluble dye. Thecomposition may comprise a stabilizer, a colorant, and a matrix.

The absorbent article may also comprise an acquisition layer asadditional layer, configured to quickly acquire the liquid away from thetopsheet so as to provide a good dryness for the wearer. Such anacquisition layer may be placed directly under the topsheet. Theabsorbent article may also comprise a distribution layer typicallyplaced between the acquisition layer and the absorbent core. Theacquisition and distribution layer may also be formed as one integrallayer. The acquisition layer may comprise a non-woven material, forexample a SMS or SMMS material, comprising a spunbonded, a melt-blownand a further spunbonded layer or alternatively a carded chemical-bondednonwoven.

In an embodiment, the width of the first and second attachment zone(measured in in a transverse direction of the absorbent core) may bedifferent from the width of the third and fourth attachment zone. Alsothe width of any one of the attachment zones may vary along alongitudinal direction of the absorbent core.

BRIEF DESCRIPTION OF FIGURES

The accompanying drawings are used to illustrate presently preferrednon-limiting exemplary embodiments of devices of the present invention.The above and other advantages of the features and objects of theinvention will become more apparent and the invention will be betterunderstood from the following detailed description when read inconjunction with the accompanying drawings, in which:

FIG. 1A is a perspective view of an exemplary embodiment of a diaper;

FIG. 1B is a top plan view of the diaper of FIG. 1A;

FIG. 1C is a schematic cross-section along line C-C of FIG. 1B;

FIG. 1D is a schematic cross-section along line D-D of FIG. 1B;

FIG. 2A is a perspective view of an exemplary embodiment of a diaper;

FIG. 2B is a top plan view of the diaper of FIG. 2A:

FIGS. 3-8 are perspective view of other exemplary embodiments of adiaper;

FIGS. 9A and 9B are cross-sectional views illustrating the effect ofliquid being absorbed by the absorbent core of an exemplary embodimentof an absorbent article; and

FIG. 10 illustrates schematically an exemplary embodiment of a methodand apparatus for manufacturing an absorbent article;

FIG. 10A shows a cross section of an insert placed at a non-suction zoneof the exemplary embodiment of FIG. 10;

FIG. 10B shows a top view indicating how inserts may be positioned inorder to create non-suction zones for the exemplary embodiment of FIG.10;

FIG. 10C shows a cross section of the absorbent core when the secondsheet 120 is being applied;

FIG. 10D shows a cross section of the absorbent core before attachingthe first sheet 110 to the second sheet 120;

FIGS. 10E-10H illustrate an alternate method for manufacturing anabsorbent article, wherein 10E shows glue application to the bottom corewrap. IOF shows glue application to the top core wrap, 10G shows thecombined bottom and top core wraps, and IOF shows the absorbent articleafter the manufacturing steps.

FIG. 11A shows a top view of an exemplary embodiment of an absorbentcore with four attachment zones using a first exemplary embodiment of asealing pattern;

FIG. 11B shows a top view of an exemplary embodiment of an absorbentcore with four attachment zones using a second exemplary embodiment of asealing pattern:

FIG. 11C shows a top view of an exemplary embodiment of an absorbentcore with four attachment zones using a third exemplary embodiment of ascaling pattern;

FIG. 11D illustrates a fourth exemplary embodiment of a possible sealingpattern;

FIG. 11E illustrates a fifth exemplary embodiment of a possible sealingpattern:

FIG. 12 is a perspective view of an exemplary embodiment of a diaper ina wetted state;

FIGS. 13A and 13B are cross-sectional views illustrating the effect ofliquid being absorbed by a traditional absorbent core and liquid beingabsorbed by an absorbent core according to an exemplary embodiment ofthe invention, respectively:

FIG. 14 illustrates a schematic cross-section of an absorbent core,wherein three possible locations are indicated for the attachment zones:

FIGS. 15A-15X illustrate exemplary embodiments of an absorbent coreaccording to the invention;

FIGS. 16A-16S illustrate other exemplary embodiments of an absorbentcore according to the invention;

FIGS. 17A-17V illustrate yet other exemplary embodiments of an absorbentcore according to the invention;

FIGS. 18A-18G illustrate yet other exemplary embodiments of an absorbentcore according to the invention;

FIGS. 19A-19D illustrate yet other exemplary embodiments of an absorbentcore according to the invention;

FIGS. 20A-20Z illustrate yet other exemplary embodiments of an absorbentcore according to the invention;

FIGS. 21A-21Z illustrate yet other exemplary embodiments of an absorbentcore according to the invention;

FIGS. 22A-22Z illustrate yet other exemplary embodiments of an absorbentcore according to the invention;

FIGS. 23A-23V illustrate yet other exemplary embodiments of an absorbentcore according to the invention;

FIGS. 24A-24C are photographs of an exemplary embodiment of a diaper ina dry and wetted state;

FIGS. 25A-25Z illustrate yet other exemplary embodiments of an absorbentcore according to the invention; and

FIGS. 26A-26T illustrate yet other exemplary embodiments of an absorbentcore according to the invention;

FIGS. 27A and 27B illustrate another exemplary embodiment of anabsorbent article according to the invention;

FIGS. 28A-28F illustrate different embodiments of a top core wrap sheet110 and/or bottom core wrap sheet 120 of an absorbent core;

FIGS. 28-35 illustrate yet other exemplary embodiments of an absorbentcore according to the invention;

FIGS. 36A-36P illustrate yet other exemplary embodiments of an absorbentcore according to the invention;

FIG. 37 illustrates schematically another exemplary embodiment of amethod and apparatus for manufacturing an absorbent article;

FIG. 38 shows a cross section of a first exemplary embodiment of a firstroller brush being applied above the first sheet material;

FIG. 39 shows a cross section of a second exemplary embodiment of afirst roller brush being applied above the first sheet material;

FIG. 40 shows a cross section of a third exemplary embodiment of a firstroller brush being applied above the first sheet material:

FIG. 41 shows a cross section of an exemplary embodiment of an air jetsystem being applied above the first sheet material.

FIG. 42A-B show schematically other exemplary embodiments of a methodand apparatus for manufacturing an absorbent article comprising a secondroller brush.

DESCRIPTION OF EMBODIMENTS Definitions

As used herein, the following terms have the following meanings:

“A”, “an”, and “the” as used herein refers to both singular and pluralreferents unless the context clearly dictates otherwise. By way ofexample, “an edge barrier” refers to one or more than one edge barrier.

“About” as used herein referring to a measurable value such as aparameter, an amount, a temporal duration, and the like, is meant toencompass variations of +/−20% or less, preferably +/−10% or less, morepreferably +/−5% or less, even more preferably +/−1% or variations areappropriate to perform in the disclosed invention. However, it is to beunderstood that the value to which the modifier “about” refers is itselfalso specifically disclosed.

“Absorbent article”, “absorbent garment”, “absorbent product”,“absorbing article”, “absorbing garment”. “absorbing product” and thelike as used herein are used interchangeably and refer to devices thatabsorb and contain bodily exudates, and more specifically, refers todevices that are placed against or in proximity to the body of thewearer to absorb and contain the various liquids discharged from thebody. Absorbent articles include but are not limited to feminine hygienegarments, baby diapers and pants, adult incontinence garments, variousdiaper and pants holders, liners, towels, absorbent inserts and thelike.

“Absorbent core” as used herein refers to a three-dimensional part ofthe absorbent structure, comprising liquid-absorbing material, useful topermanently absorb and/or retain bodily exudates. “Absorbent component”as used herein refers to a structural constituent of an absorbentarticle. e.g., a piece of an absorbent core, such as one of multiplepieces in a multi-piece absorbent core. “Absorbent element” as usedherein refers to a part of a functional constituent of an absorbentstructure. e.g., a acquisition layer, a dispersion layer, core layer ora release structure formed of a material or materials having particularliquid handling characteristics suitable for the specific function.

“Absorbent fibrous polymer material” as used herein refers to anabsorbent polymer material which is in threadlike from such as fibers,filaments, and the like so as to be less flowable in the dry state thanparticulates.

“Absorbent insert” as used herein refers to a device adapted forinsertion into an “Absorbent layer” as used herein refers to a termreferring to a discrete, identifiable sheet-like or web-like element ofan absorbent article which may remain detached and relatively movablewith respect to another such element or may be attached or joined so asto remain permanently associated with another such element. Eachabsorbent layer may itself include a laminate or combination of severallayers, sheets and/or webs of similar or diverse compositions.

“Absorbent polymer material”, “absorbent gelling material”, “AGM”,“superabsorbent”, “superabsorbent material”, “super absorbent polymer”,“SAP” and the like as used herein are used interchangeably and refer toany suitable particulate (e.g., flaked, particulate, granular, orpowdered) or fibrous cross linked polymeric materials that can absorb atleast 5 times and preferably at least about 10 times or more its weightof an aqueous 0.9% saline solution as measured using the CentrifugeRetention Capacity test (EDANA 441.2-01).

“Absorbent polymer material area” as used herein refers to the area ofthe absorbent structure wherein adjacent layers are separated by amultiplicity of absorbent polymer material. Incidental contact areasbetween these adjacent layers within the absorbent particulate polymermaterial area may be intentional (e.g bond area's) or unintentional(e.g. manufacturing artifacts).

“Absorbent particulate polymer material” as used herein refers to anabsorbent polymer material which is in particulate form such as powders,granules, flakes and the like so as to be flowable in the dry state.

“Absorption” as used herein refers to the process by which a liquid istaken up within a material.

“Absorption rate” as used herein refers to the rate of absorption ofliquid, i.e. the amount of liquid which is absorbed per unit of time,typically by an absorbent component, element and/or absorbent layer ofthe absorbent article, structure and/or core.

“Acquisition layer”. “acquisition region”. “acquisition surface” or“acquisition material” and the like as used herein refer to the layeroverlying the absorbent core having a faster liquid uptake and/ordistribution capability.

“Absorbency” is the ability of a material to take up fluids by variousmeans including capillary, osmotic, solvent, chemical and/or otheraction.

“Adult incontinence garment” as used herein refers to absorbent articlesintended to be worn by incontinent adults, for absorbing and containingbodily exudates.

“Adhesion” as used herein refers to the force that holds differentmaterials together at their interface.

“Adhesive” as used herein refers to a material, which may or may not beflowable in solution or when heated, that is used to bond materialstogether.

“Adsorption” as used herein refers to the process by which a liquid istaken up by the surface of a material.

“Airlaying” as used herein refers to forming a web by dispersing fibersor particles in an air stream and condensing them from the air streamonto a moving screen by means of a pressure and/or vacuum; a web offibers produced by airlaying is herein referred to an “airlaid”; anairlaid web bonded by one or more techniques to provide fabric integrityis herein referred to an “airlaid nonwoven”.

“Apparent density”. “density” as used herein refers to the basis weightof the sample divided by the caliper with appropriate unit conversionsincorporated therein. Apparent density used herein has the unit g/cm3.

“Attach”, “attached” and “attachment” as used herein are synonymous withtheir counterparts of the terms “fasten”, “affix”, “secure”, “bind”,“join” and “link”.

“Baby diaper” as used herein refers to absorbent articles intended to beworn by children, for absorbing and containing bodily exudates which theuser draws up between the legs and fastens about the waist of thewearer.

“Baby pants” as used herein refers to absorbent articles marketed foruse in transitioning children from diapers to underwear intended tocover the lower torso of children, so as to absorb and contain bodyexudates which article is generally configured like a panty garment andmanufactured with a completed waist encircling portion, therebyeliminating the need for the user to fasten the article about the waistof the wearer.

“Back region” as used herein refers to the portion of an absorbentarticle or part thereof that is intended to be positioned proximate theback of a wearer.

“Backing” as used herein refers to a web or other material that supportsand reinforces the back of a product.

“Basis weight” is the weight per unit area of a sample reported in gramsper square meter, g/m2 or gsm.

“Bodily exudates”, “body exudates”, “bodily fluids”. “body fluids”,“bodily discharges”, “body discharges”, “fluid(s)”, “liquid(s)”,“fluid(s) and liquid(s) and the like as used herein are usedinterchangeably and refer to, but are not limited to urine, blood,vaginal discharges, breast milk, sweats and fecal matter.

“Binder”, “adhesive”, “glue”, “resins”, “plastics” and the like as usedherein are used interchangeably and refer to substances, generally in asolid form (e.g. powder, film, fiber) or as a foam, or in a liquid form(e.g. emulsion, dispersion, solution) used for example by way ofimpregnation, spraying, printing, foam application and the like used forattaching or bonding functional and/or structural components, elementsand materials, for example including heat and/or pressure sensitiveadhesives, hot-melts, heat activated adhesives, thermoplastic materials,chemical activated adhesives/solvents, curable materials and the like.

“Bond strength” as used herein refers to the amount of adhesion betweenbonded surfaces. It is a measure of the stress required to separate alayer of material from the base to which it is bonded. “Capillaryaction”, “capillarity”, or “capillary motion” and the like as usedherein are used to refer to the phenomena of the flow of liquid throughporous media.

“Chassis” as used herein refers to a foundational constituent of anabsorbent article upon which the remainder of the structure of thearticle is built up or overlaid, e.g., in a diaper, the structuralelements that give the diaper the form of briefs or pants whenconfigured for wearing, such as a backsheet, a topsheet, or acombination of a topsheet and a backsheet.

“Cellulose fibers” as used herein refers to naturally occurring fibersbased on cellulose, such as, for example cotton, linen, etc; wood pulpfibers are one example of cellulose fibers; man-made fibers derived fromcellulose, such as regenerated cellulose (rayon), or partially or fullyacetylated cellulose derivatives (e.g. cellulose acetate or triacetate)are also considered as cellulose fibers.

“Cluster” or the like as used herein refers to an agglomeration ofparticles and/or fibers.

“Chemically stiffened fibers”, chemically modified fibers”, “chemicallycross-linked fibers”, “curly fibers” and the like as used herein areused interchangeably and refer to any fibers which have been stiffenedby chemical means to increase stiffness of the fibers under both dry andaqueous conditions, for example by way of addition of chemicalstiffening agents (e.g. by coating, impregnating, etc), altering thechemical structure of the fibers themselves (e.g. by cross-linkingpolymer chains, etc) and the like.

“Cohesion” as used herein refers to the resistance of similar materialsto be separated from each other.

“Compartment” as used herein refers to chambers, cavities, pockets andthe like.

“Comprise,” “comprising,” and “comprises” and “comprised of” as usedherein are synonymous with “include”, “including”, “includes” or“contain”, “containing”. “contains” and are inclusive or open-endedterms that specify the presence of what follows e.g. a component and donot exclude or preclude the presence of additional, non-recitedcomponents, features, elements, members, steps, known in the art ordisclosed therein.

“Coverstock” as used herein refers to a lightweight non-woven materialused to contain and conceal an underlying absorbent core material;examples are the facing layer or materials that cover the absorbentcores of feminine hygiene garment s, baby diapers and pants and adultincontinence garments.

“Crotch region” of an absorbent article as used herein refers to about50% of the absorbent article's total length (i.e., in the y-dimension),where the crotch point is located in the longitudinal center of thecrotch region. That is, the crotch region is determined by firstlocating the crotch point of the absorbent article, and then measuringforward and backward a distance of 25% of the absorbent article's totallength.

“Cross direction (CD)”, “lateral” or “transverse” and the like as usedherein are used interchangeably and refer to a direction which isorthogonal to the longitudinal direction and includes directions within+45° of the transversal direction.

“Curing” as used herein refers to a process by which resins, binders orplastics are set into or onto fabrics, usually by heating, to cause themto stay in place; the setting may occur by removing solvent or bycross-linking so as to make them in soluble.

“Diaper”, “conventional diaper”, “diaper-like”, “diaper-like garment”and the like as used herein are used interchangeably and refer todisposable absorbent articles, which typically include a front waistportion and a back waist portion which may be releasable connected aboutthe hips of the wearer during use by conventional fasteners such asadhesive tape fasteners or hook and loop type fasteners. In use, thearticle is positioned between the legs of the wearer and the fastenersare releasable attached to secure the back waist portion to the frontwaist portion of the diaper, thereby securing the diaper about the waistof the wearer. The front waist portion and a back waist portion areconnected by relatively non-stretchable or stretchable members (the term“stretchable” as used herein refers to materials that are extensiblewhen forces are applied to the material, and offer some resistance toextension). Hence, such articles are generally not configured to bepulled up or down over the hips of the wearer when the fasteners areattached.

“Dispersion layer”, “dispersion region”, “dispersion surface” or“dispersion material” and the like as used herein refer to the layeroverlying the absorbent core having a faster liquid uptake anddispersion capability.

“Disposable” is used herein to describe articles that are generally notintended to be laundered or otherwise restored or reused (i.e., they areintended to be discarded after a single use and, preferably, to berecycled, composted or otherwise disposed of in an environmentallycompatible manner).

“Drylaying” as used herein refers to a process for making a nonwoven webfrom dry fiber; these terms apply to the formation of carded webs, aswell as to the air laying formation of random webs; a web of fibersproduced by drylaying is herein referred to as a “drylaid”; a drylaidweb bonded by one or more techniques to provide fabric integrity isherein referred to a “drylaid nonwoven”.

“Dry strength” as used herein refers to the strength of a jointdetermined in dry state conditions, immediately after drying underspecified conditions or after a period of conditioning in the standardlaboratory atmosphere.

“Essentially cellulose free”. “substantially fluffless” or “little to nocellulose fibers” as used herein refers to an absorbent article,structure, core component and/or element containing less than 20% byweight cellulosic fibers, less than 10% cellulosic fibers, less than 5%cellulosic fibers, no cellulosic fibers, or no more than an immaterialamount of cellulosic fibers which do not materially affect the thinness,flexibility or absorbency thereof.

“Essentially fluffless” or “little to no fluff pulp” as used hereinrefers to an absorbent article, structure, core, component and/orelement containing less than 20% by weight fluff pulp, less than 10%fluff pulp, less than 5% fluff pulp, no fluff pulp, or no more than animmaterial amount of fluff pulp which do not materially affect thethinness, flexibility or absorbency thereof.

“Fabric” as used herein refers to a sheet structure made from fibers,filaments and/or yarns. “Feminine hygiene garments” as used herein referto absorbent hygiene articles intended to be worn by woman, forabsorbing and containing body exudates.

“Fiber” as used herein refers to the basic threadlike structure fromwhich nonwovens, yarns and textiles are made. It differs from a particleby having a length at least 4 times its width; “Natural fibers” areeither of animal (wool, silk), vegetable (cotton, flax, jute) or mineral(asbestos) origin, while “Man-made fibers” may be either polymerssynthesized from chemical compounds (polyester, polypropylene, nylon,acrylic etc.) or modified natural polymers (rayon, acetate) or mineral(glass). “Fiber” and “filament” are used interchangeably.

“Fluff pulp” or “Pulp fluff” as used herein refers to wood pulpspecially prepared to be drylaid. The fibers can be either natural orsynthetic or a combination thereof.

“Front region” as used herein refers to the portion of an absorbentarticle or part thereof that is intended to be positioned proximate thefront of a wearer.

“Garment facing layer” as used herein refers to elements of the chassisthat form the outer surface of the absorbent article, such as thebacksheet, the side panels, the waist fasteners, and the like, when suchelements are present.

“Heat activated adhesive” as used herein refers to a dry adhesive thatis rendered tacky or fluid by application of heat or heat and pressureto the assembly.

“Heat sealing adhesive” as used herein refers to a thermoplasticadhesive which is melted between the adherent surfaces by heatapplication to one or both of the adjacent adherent surfaces.

“High loft” as used herein refers to general term of low density, thickor bulky fabrics.

“Hot-melt adhesive” as used herein refers to a solid material that meltsquickly upon heating, then sets to a firm bond upon cooling; used foralmost instantaneous bonding.

“Hydrophilic” as used herein refers to having an affinity for beingwetted by water or for absorbing water.

“Hydrophobic” as used herein refers to lacking the affinity for beingwetted by water or for absorbing water.

“Immobilization layer” as used herein refers to a layer able to beapplied to the absorbent polymer material or absorbent polymer materialarea with the intent to gather, bond and/or immobilize absorbentmaterial and/or absorbent layer.

“Join”, “joined” and “joining” as used herein refers to encompassingconfigurations wherein an element is directly secured to another elementby affixing the element directly to the other element, as well asconfigurations wherein the element is indirectly secured to the otherelement by affixing the element to an intermediate member or memberswhich in turn is or are affixed to the other element.

“Knitting” as used herein refers to the technique for interlocking loopsof fibers with needles or similar devices.

“Layer” refers to identifiable components of the absorbent article, andany part referred to as a “layer” may actually comprise a laminate orcombination of several sheets or webs of the requisite type ofmaterials. As used herein, the term “layer” includes the terms “layers”and “layered.”

“Upper” refers to the layer of the absorbent article which is nearest toand/or faces the wearer facing layer; conversely, the term “lower”refers to the layer of the absorbent article which is nearest to and/orfaces the garment facing layer. “Layer” is three dimensional structurewith a x dimension width, y dimension length, and z-dimensions thicknessor caliper, said x-y dimensions being substantially in the plane of thearticle, however it should be noted that the various members, layers,and structures of absorbent articles according to the present inventionmay or may not be generally planar in nature, and may be shaped orprofiled in any desired configuration.

“Machine direction (MD)”, “longitudinal” and the like as used herein areused interchangeably and refer to a direction running parallel to themaximum linear dimension of the structure and includes directions within±45′ of the longitudinal direction.

“Major surface” as used herein refers to a term used to describe thesurfaces of greatest extent of a generally planar or sheet-likestructural element and to distinguish these surfaces from the minorsurfaces of the end edges and the side edges, i.e., in an element havinga length, a width, and a thickness, the thickness being the smallest ofthe three dimensions, the major surfaces are those defined by the lengthand the width and thus having the greatest extent.

“Mass flow” as used herein refers to the flow of a liquid from oneabsorbent element or component to another absorbent element or componentby channel flow action.

“Mechanical bonding” as used herein refers to a method of bonding fibersby entangling them. This can be achieved by needling, stitching withfibers or by the use of high-pressure air or water jets and the like.

“Nonwoven” as used herein refers to manufactured sheet, web or batt ofdirectionally or randomly orientated fibers, bonded by friction, and/orcohesion and/or adhesion, excluding paper and products which are woven,knitted, tufted, stitch-bonded incorporating binding yarns or filaments,or felted by wet-milling, whether or not additionally needled. Thefibers may be of natural or man-made origin and may be staple orcontinuous filaments or be formed in situ. Commercially available fibershave diameters ranging from less than about 0.001 mm to more than about0.2 mm and they come in several different forms: short fibers (known asstaple, or chopped), continuous single fibers (filaments ormonofilaments), untwisted bundles of continuous filaments (tow), andtwisted bundles of continuous filaments (yarn). Nonwoven fabrics can beformed by many processes such as melt blowing, spun bonding, solventspinning, electrospinning, and carding. The basis weight of nonwovenfabrics is usually expressed in grams per square meter (gsm).

“Pant”, “training pant”, “closed diapers”, “prefastened diapers”,“pull-on diapers” and “diaper-pants” and the like as used herein areused interchangeably and refer to absorbent articles which are typicallyapplied to the wearer by first leading the feet into the respective legopenings and subsequently pulling the pants from the feet to waist areaover the hips and buttocks of the wearer and which are capable of beingpulled up or down over the hips of the wearer. Typically, such articlesmay include a front waist portion and a back waist portion which may beconnected about the hips of the wearer by integral or releasablemembers. A pant may be preformed by any suitable technique including,but not limited to, joining together portions of the article usingrefastenable and/or nonrefastenable bonds (e.g., seam, weld, adhesive,cohesive bond, fastener, etc.). A pant may be preformed anywhere alongthe circumference of the article (e.g., side fastened, front waistfastened).

“Polymer” as used herein refers to but is not limited to, homopolymers,copolymers, such as for example, block, graft, random and alternatingcopolymers, terpolymers, etc. and blends and modifications thereof.Unless otherwise specifically limited, the term “polymer” includes allpossible spatial configurations of the molecule and include, but are notlimited to isotactic, syndiotactic and random symnmetries.

“Rear” as used herein refers to the portion of an absorbent article orpart thereof that is intended to be positioned proximate the back of thewearer.

“Release structure”, “release region”, “release surface” or “releasematerial” and the like as used herein are used interchangeably and referto a structure in fluid communication with the absorbent core having alarger relative liquid absorption capacity and/or rate allowing it toquickly take up, temporarily hold and releasing liquids.

“Resin” as used herein refers to a solid or semisolid polymericmaterial.

“Thermobonding” as used herein refers to a method of bonding fibers bythe use of heat and/or high-pressure.

“Thermoplastic” as used herein refers to polymeric materials that have amelting temperature and can flow or be formed into desired shapes on theapplication of heat at or below the melting point.

“Ultrasonic” as used herein refers to the use of high frequency sound togenerate localized heat through vibration thereby causing thermoplasticfibers to bond to one another.

“Water-absorbing”. “liquid-absorbing”, “absorbent”, “absorbing” and thelike as used herein are used interchangeably and refer to compounds,materials, products that absorb at least water, but typically also otheraqueous fluids and typically other parts of bodily exudates such as atleast urine or blood.

“Wearer facing layer” as used herein refers to elements of the chassisthat form the inner surface of the absorbent article, such as thetopsheet, the leg cuffs, and the side panels, etc., when such elementsare present.

“Weaving” as used herein refers to the process of interlacing two ormore sets of yarns at right angles to form a fabric; a web of fibersproduced by weaving is herein referred to as a “woven”.

“Web material” as used herein refers to an essentially endless materialin one direction, i.e. the longitudinal extension or the length, or thex-direction in Cartesian coordinates relative to the web material.Included in this term is an essentially unlimited sequence of pieces cutor otherwise separated from an essentially endless material. Often,though not necessarily, the web materials will have a thicknessdimension (i.e. the z-direction) which is significantly smaller than thelongitudinal extension (i.e. in x-direction). Typically, the width ofweb materials (they-direction) will be significantly larger than thethickness, but less than the length. Often, though not necessarily, thethickness and the width of such materials is essentially constant alongthe length of the web. Without intending any limitation, such webmaterials may be cellulosic fiber materials, tissues, woven or nonwovenmaterials and the like. Typically, though not necessarily, web materialsare supplied in roll form, or on spools, or in a folded state in boxes.The individual deliveries may then be spliced together to form theessentially endless structure. A web material may be composed of severalweb materials, such as multilayer non-woven, coated tissues,nonwoven/film laminates. Web materials may comprise other materials,such as added binding material, particles, hydrophilizing agents and thelike.

“Wet burst strength” is a measure of a layer's ability to absorb energy,when wet and subjected to deformation normal to the plane of the web.

“Wet strength” as used herein refers to the strength of a jointdetermined immediately after removal from a liquid in which it has beenimmersed under specified conditions of time, temperature and pressure.The term is commonly used in the art to designate strength afterimmersion in water.

“Wetlaying” as used herein refers to the forming a web from an aqueousdispersion of fibers by applying modified paper making techniques; a webof fibers produced by wetlaying is herein referred to as a “wetlaid”.

“Wood pulp” as used herein refers to cellulosic fibers used to makeviscose rayon, paper and the absorbent cores of products such asfeminine hygiene garments, baby diapers and pants and adult incontinencegarments.

“X-y dimension” as used herein refers to the plane orthogonal to thethickness of the article, structure or element. The x- and y-dimensionscorrespond generally to the width and length, respectively, of thearticle, structure or element.

“Z-dimension” as used herein refers to the dimension orthogonal to thelength and width of the article, structure or element. The z-dimensioncorresponds generally to the thickness of the article, structure orelement.

Unless otherwise defined, all terms used in disclosing the invention,including technical and scientific terms, have the meaning as commonlyunderstood by one of ordinary skill in the art to which this inventionbelongs. By means of further guidance, term definitions are included tobetter appreciate the teaching of the present invention.

The same or similar features and components are indicated with the samereference numerals throughout the figures.

As will be illustrated with embodiments of the figures, the absorbentarticle in accordance with embodiments of the invention can be bettertailored to the needs of the wearer, wherein any one or more of thefollowing may be taken into account: sex, age, weight, type of bodilyexudates (urine, stool, etc.), pelvis size, etc. Not only for babydiapers but also for adult incontinence absorbent articles, the liquidabsorption and management properties can be significantly improved.

FIGS. 1A-1D

FIGS. 1A, 1B, 1C and 1D illustrate an exemplary embodiment of anabsorbent article, here a diaper. FIG. 1B shows the absorbent article inits flat out, un-contracted state with the wearer side facing theviewer. The skilled person understands that the absorbent article mayalso be a pant or an adult incontinence garment or the like. Theabsorbent article 100 comprises a liquid pervious topsheet, a liquidimpervious backsheet, and an absorbent core 130 positioned in betweenthe topsheet and the backsheet. The absorbent core 130 comprisesabsorbent material 105 between a top core wrap sheet 110 and a back corewrap sheet 120. Absorbent core 130 has a first and second longitudinaledge 131, 132 and a first and second transverse edge 133, 134.

The absorbent core 130 is provided with a plurality of attachment zones145, 155, 165, 175 comprising at least a first attachment zone 145 and asecond attachment zone 155. The first and second attachment zones extendnext to each other from the crotch region CR in the direction of thefirst and/or second transverse edge 133, 134. In first and secondattachment zone 145, 155 the top core wrap sheet 110 is attached to theback core wrap sheet 120

-   -   along an attachment which extends, seen in a transverse        direction of the absorbent core, over a transverse distance        which is at least 1 mm, preferably at least 2 mm, more        preferably at least 3 mm, most preferably at least 4 mm; and/or    -   along a discontinuous attachment at a plurality of locations at        a distance of each other, seen in the transverse direction of        the absorbent core. In that manner, upon wetting of the        absorbent material, a first and second channel 140, 150 are        created at said first and second attachment zone 145, 155,        respectively.

Absorbent article 100 is provided at said top core wrap sheet with atleast a first and a second attachment zone 145, 155 located a distanced12 of each other. In that manner a first and second channel 140, 150formed upon wetting, each extend from a crotch region CR in thedirection of the first transverse edge 133. Preferably the distance d12is between 10 mm and 50 mm, more preferably between 15 and 30 mm.Preferably, the length of the first and second channel is substantiallythe same, more preferably the length l1 of the first channel and thelength l2 of the second channel is between 60 mm and 140 mm, morepreferably between 75 mm and 125 mm. Preferably, the distance betweenthe first attachment zone 145 and the first longitudinal side 131 isbetween 20 and 30 mm, and the distance between the second attachmentzone 155 and the second longitudinal side 132 is between 20 and 30 mm.Preferably, the distance between the first/second attachment zone 145,155 and the transverse edge 133 is between 50 and 125 mm, morepreferably between 75 and 115 mm.

First channel 140 and second channel 150 are substantially parallel andrun in the longitudinal direction of absorbent core 130. However, it isalso possible for first and second channel 140, 150 to extend under asmall angle with respect to the longitudinal direction of absorbent core130. e.g. an angle between 5 and 10°. For example, first and secondattachment zone 145, 155 (and hence first and second channel 140, 150)may be diverging slightly outwardly in the direction of first transverseedge 133. Preferably first channel 140 and second channel 150 arearranged symmetrically with respect to a longitudinal center line CL ofabsorbent core 130.

Absorbent article 100 is further provided with a third and a fourthchannel 160, 170 located at a distance d34 of each other. Third andfourth channel 160, 170 each extend from crotch region CR in thedirection of second transverse edge 134. The distance d12 between firstand second channel 140, 150 is different from the distance d34 betweenthird and fourth channel 160, 170. Preferably the distance d34 isbetween 25 mm and 80 mm, more preferably between 35 mm and 55 mm.

Preferably, the length of the third and fourth channel 160, 170 issubstantially the same, more preferably the length l3 of the thirdchannel and the length l4 of the fourth channel is between 30 mm and 130mm, more preferably between 30 mm and 70 mm. Preferably, the distancebetween the third attachment zone 165/third channel 160 and the firstlongitudinal side 131 is between 20 and 30 mm, and the distance betweenthe fourth attachment zone 175 and the second longitudinal side 132 isbetween 20 and 30 mm. Preferably, the distance between the third/fourthattachment zone 165, 175 and the transverse edge 134 is between 30 mmand 100 mm, more preferably between 40 mm and 75 mm.

Third channel 160 and fourth channel 170 are substantially parallel andrun in the longitudinal direction of absorbent core 130. However, it isalso possible for third and fourth channel 160, 170 to extend under asmall angle with respect to the longitudinal direction of absorbent core130, e.g. an angle between 5 and 10°. For example, third and fourthchannel 160, 170 may be diverging slightly outwardly in the direction ofsecond transverse edge 134. Preferably third channel 160 and fourthchannel 170 are arranged symmetrically with respect to a longitudinalcenter line CL of absorbent core 130.

Preferably, the distance between an end point 141 of first channel 140and an end point 161 of third channel 160 is smaller than 25 mm, morepreferably smaller than 20 mm. Similarly, preferably, the distancebetween an end point 151 of second channel 150 and an end point 171 offourth channel 170 is smaller than 25 mm, more preferably smaller than20 mm. More preferably, endpoints 141, 151, 161 and 171 are located onsubstantially the same transverse line L functioning as a fold linealong which the diaper can be folded in two.

First, second, third and fourth channel 140, 150, 160, 170 each have abottom which forms the attachment zone 145, 155, 165, 175, see FIG. 1Cand FIG. 1D. At bottom 145, 155, 165, 175 top core wrap sheet 110 isattached to back core wrap sheet 120. The width w of the bottom, seen ina transverse direction of absorbent core 130, is preferably larger than2 mm, more preferably larger than 3 mm and even more preferable largerthan 4 mm. To that end the attachment between top core wrap sheet 110and the back core wrap sheet 120 may be an attachment extending over atransverse distance which is at least 2 mm, preferably at least 3 mm,more preferably at least 4 mm; and/or the attachment may be adiscontinuous attachment in a plurality of locations at a distance ofeach other, seen in a transverse direction of absorbent core 130.

Preferably the attachment (i.e. the joint) at the bottom between the topcore wrap sheet and the back core wrap sheet is realized by any one ofthe following or a combination thereof: pressure bonding, thermobonding,sonic bonding, chemical bonding, adhesive, mechanical bonding. Theattachment/joining may be a direct or indirect attachment/joining. E.g,an adhesive and/or other intermediate material may be inserted betweenthe top core wrap sheet and the back core wrap sheet. For example, astructure or layer having no or less absorption capacity than theabsorbent material may be added in between the top core wrap sheet andthe back core wrap in the attachment area.

Outside of the plurality of channels 140, 150, 160, 170, absorbent core130 has a maximum thickness t. Preferably, each channel 140, 150, 160,170 extends through at least 90% of the maximum thickness of absorbentcore 130, more preferably through 100% of the thickness of absorbentcore 130, such that, in the channel 140, 150, 160, 170, substantially noabsorbent material is present that between top core wrap sheet 110 andback core wrap sheet 120. It is noted that the channel 140, 150, 160,170 may be located below and/or above the attachment zones 145, 155,165, 175, as will be explained in more detail below with reference toFIG. 14.

In a possible embodiment the attachment 145, 155, 165, 175 between topcore wrap sheet 110 and back core wrap sheet 120, here at a bottom ofeach channel 140, 150, 160, 170, is a semi-permanent attachmentconfigured to release after having been in contact with urine for apredetermined period of time, wherein said predetermined period of timeis preferably smaller than 30 s.

In another possible embodiment the attachment between top core wrapsheet 110 and back core wrap sheet 120, here at the bottom of eachchannel 140, 150, 160, 170, is a permanent attachment; and absorbentcore 130 is configured such that, in a wetted state of absorbent core130, the absorbent material extends over bottom 145, 155, 165, 175 ofchannel 140, 150, 160, 170. This is illustrated in FIGS. 9A and 9B forfirst and second channels 140, 150. Channels 140, 150, 160, 170 guideurine U or any other aqueous liquid through the side walls of channels140, 150, 160, 170 into absorbent core 130. Those side walls create anadditional path along which the liquid can flow into absorbent core 130and enhance the diffusion of the liquid into absorbent core 130. Also,because of the swelling of the core material of absorbent core 130, theouter bands of absorbent core 130 will rotate around channels 140, 150,160, 170 as indicated by arrows A in FIG. 9B. In that manner the diapertakes the shape of a tub or cup, such that any liquid NL which would notyet be absorbed by the absorbent material 105 is maintained in the tubshape. This results in a better protection against leakage and a diaperfitting perfectly to the body. Hence the diaper of FIGS. 1A-1D willcreate more freedom of movement for the wearer of a wetted diaper.

It is clear to the skilled person that the attachment zones may beprovided by means of continuous attachments in the transversal directionof the absorbent core and/or continuous attachments in the longitudinaldirection of the absorbent core and/or discontinuous attachments in thetransversal direction of the absorbent core and/or discontinuousattachments in the longitudinal direction of the absorbent core.

Absorbent core 130 has a front portion 130 a extending at one side of atransverse crotch line which corresponds in this embodiment with foldline L, and a rear portion 130 b extending at the other side of thetransverse crotch line L. First and second channel 140, 150 extend atleast in front portion 130 a of absorbent core 130, and third and fourthchannel 160, 170 extend at least in rear portion 130 b of the absorbentcore 130. Preferably the distance d12 between first and second channel140, 150 in front portion 130 a is smaller than the distance d34 betweenthird and fourth channel 160, 170 in rear portion 130 b.

Absorbent core 130 of FIGS. 1A and 1B is preferred for female persons.Absorbent core 130 has a first and second side edge 131, 132, a frontedge 133 and a rear edge 134, wherein the absorbent core 130 is providedwith a plurality of attachment zones 140, 150, 160, 170 where the topcore wrap sheet is attached to the back core wrap sheet, and wherepreferably substantially no absorbent material is present. The pluralityof attachment zones comprise at least a first and a second elongateattachment zone 140, 150 extending next each other, at least in thefront portion of the absorbent core in the direction of the front edge133, and a third and a fourth elongate attachment zone 160, 170extending next to each other, at least in the rear portion 130 b of theabsorbent core 130, in the direction of the rear edge 134. It is notedthat the first and second elongate attachment zone 140, 150 correspondwith the third and fourth elongate attachment zone of claim 1, and thatthe third and fourth elongate attachment zone 160, 170 correspond withthe first and fourth attachment zone of claim 1.

Measured in a transverse direction, a first largest distance d12 betweenthe first and the second attachment zone 140, 150 is smaller than asecond largest distance d34 between the third and the fourth attachmentzone 160, 170. Preferably the second distance d34 is at least 5%, morepreferably at least 10% bigger, even more preferably at least 20% biggerthan a second distance d12. The distance d34 may be between 15 and 70%of the width of the absorbent core, more preferably between 20 and 50%;wherein preferably the distance d34 is between 10 mm and 100 mm, morepreferably between 20 mm and 80 mm, even more preferably between 30 mmand 70. The distance d12 is between 5 and 60% of the width of theabsorbent core, more preferably between 10 and 40%; wherein preferablythe distance d12 is between 5 mm and 60 mm, more preferably between 10mm and 50 mm, even more preferably between 15 mm and 40 mm. Due to thespecific physiological structure of a female at the genital region, sucha pattern has the advantage that liquid can be distributed oversubstantially the entire absorbent core, and that any leakage risks invarious positions of the female wearer can be reduced.

The absorbent core 130 comprises a front portion 130 a extending betweenthe front edge 133 and a transverse crotch line L of the absorbent core130, and a rear portion 130 b extending between the rear edge 134 andthe transverse crotch line L of the absorbent core 130. Preferably adistance between the transverse crotch line L and a transverse centerline T extending perpendicular on the longitudinal direction of theabsorbent core 130, through the middle of the absorbent core 130, issmaller than 10%, more preferably smaller than 5% of the length of theabsorbent core 130. The first and the second elongate attachment zone140, 150 each have a front end 142, 152 adjacent to absorbent materialand a rear end 141, 151 adjacent to absorbent material; and the thirdand the fourth elongate attachment zone 160, 170 each have a rear end162, 172 adjacent to absorbent material and a front end 161, 171adjacent to absorbent material. In other embodiments the first zone 140may be connected to the third zone 160, and the second zone 150 may beconnected to the fourth zone 170.

Seen in a projection on the longitudinal direction of the absorbentcore, preferably the first and the second attachment zone 140, 150extend over a length which is more than the length of the third andfourth attachment zone 160, 170. The length of the first and the secondattachment zone 140, 150 may be larger than 30 mm, preferably largerthan 40 mm, more preferably larger than 50 mm. The length of the thirdand the fourth attachment zone may be larger than 30 mm, preferablylarger than 40 mm, more preferably larger than 50 mm. The firstattachment zone 140 and the second attachment zone 150 may be arrangedsymmetrically with respect to a longitudinal center axis of theabsorbent core 130 extending between the front edge 133 and rear edge134. Seen in a projection on a longitudinal direction, the first andsecond attachment zone 140, 150 do not overlap with the third and fourthattachment zone 160, 170. However, in other embodiments there may besome overlap.

The first attachment zone 140 may be separated from the third attachmentzone 160 by absorbent material, and the second attachment zone 150 maybe separated from the fourth attachment zone 170 by absorbent material.The absorbent material may comprise cellulosic fluff pulp and/orsuperabsorbent particles. In some embodiments the absorbent material maybe substantially fluffless.

In other non-illustrated embodiments, the first attachment zone 140 mayalso be connected to the third attachment zone 160 through a firstsemi-permanent attachment zone and the second attachment zone 150 mayalso be connected to the fourth attachment zone 170 through a secondsemi-permanent attachment zone. The semi-permanent attachment may beconfigured to release after having been in contact with urine for apredetermined period of time.

The first attachment zone 140 and the second attachment zone 150 may besubstantially parallel and extend in a longitudinal direction of theabsorbent core 130; or an angle between the first attachment zone 140and a longitudinal direction of the absorbent core 130 and an anglebetween the second attachment zone 150 and the longitudinal direction ofthe absorbent core 130 may be smaller than 5° (not illustrated). Thethird attachment zone 160 and the fourth attachment zone 170 may besubstantially parallel and extend in a longitudinal direction of theabsorbent core 130; or an angle between the third attachment zone 160and a longitudinal direction of the absorbent core 130 and an anglebetween the fourth attachment zone 170 and the longitudinal direction ofthe absorbent core 130 may be smaller than 5° (not illustrated). Seen ina projection on a longitudinal direction of the absorbent core 130, theplurality of attachment zones together may cover at least 30%,preferably at least 40% of a length of the absorbent core 130.

Preferably the plurality of attachment zones comprise substantially noabsorbent material, and may be permanent attachment zones which remainattached when wetted. In other embodiments, in the first and secondattachment zone 140, 150, the top core wrap sheet may be attached to theback core wrap sheet through permanent and semi-permanent attachmentportions, said semi-permanent portions may be being configured torelease after having been in contact with liquid whilst said permanentportions may be configured not to release after having been in contactwith liquid.

In a possible embodiment, the plurality of channels 140, 150, 160, 170together cover at least 60%, preferably at least 70% of the length la ofabsorbent core 130; indeed, in the embodiment of FIG. 1A-1D the channelscover a length equal to 11+13 which is more than 60% of the length la ofabsorbent core 130.

The plurality of channels 140, 150, 160, 170 may be indicated with acolor and/or with a pattern which is different from the color and/orpattern of topsheet. More in particular the area of the channels maycomprise a print allowing a user to visually distinguish the channels.This print may be arranged on the topsheet, on the top core wrap sheet,on the back core wrap sheet, on the backsheet, or on any sheet inbetween the topsheet and the backsheet, as long as it is visible for auser. As the sheets may be partially transparent, the print may bearranged on a sheet in between the topsheet and the backsheet, as longas it is visible through the topsheet and/or the backsheet.

Preferably the print is visible when looking at the topsheet of thediaper. For example, a topsheet area above first and second channels140, 150 may be printed with an ink of a first color and a topsheet areaabove third and fourth channels 160, 170 may be printed with the samecolor or with a different color. In that manner a user will be able toeasily recognize the front and rear portion of a diaper, and willrecognize more easily how to put on the diaper.

Preferably absorbent core 130 is provided with a plurality of attachmentzones 140, 150, 160, 170 where the top core wrap sheet is attached tothe back core wrap sheet, and where preferably substantially noabsorbent material is present. Seen in a longitudinal direction of theabsorbent core 130, looking from the front edge 133 to the rear edge134, the absorbent core 130 comprises subsequently a first, second,third, fourth and fifth zone Z1, Z2, Z3, Z4, Z5.

The absorbent core 130 comprises a front portion 130 a extending betweenthe front edge 133 and a transverse crotch line L of the absorbent core,and a rear portion 130 b extending between the rear edge 134 and thetransverse crotch line L of the absorbent core 130. The first, secondand third zone Z1, Z2, Z3 extend in the front portion 130 a of theabsorbent core and the fourth and fifth zone Z4, Z5 extend in the rearportion 130 b. Preferably, in said first and fifth zone Z1, Z5substantially no permanent attachment zones are present. However thefirst and/or fifth zone Z1, Z5 may comprise temporary secondaryattachments that loosen upon wetting. The second zone Z2 comprises afirst and a second permanent elongate front attachment zone 130, 140,said first and second front attachment zones 130, 140 extending from anedge of the first zone Z1 in the direction of the third zone Z3.

The fourth zone Z4 comprises a first and second rear elongate attachmentzone 160, 170, said first and second rear attachment zone extending froman edge of the fifth zone Z5 in the direction of the third zone Z3. Atleast one of said second, third and fourth zone comprises a capillarybridging zone B allowing a liquid flow F between the first and thesecond side edge 131, 132 by capillary action through the absorbentmaterial. The capillary bridging zone B extends between the first frontattachment zone 140 and the first rear attachment zone 160, such thatupon wetting of the absorbent material, a front and rear channel arecreated at said first front and rear attachment zone 140, 160,respectively, wherein the capillary bridging zone B extends between saidfront and rear channel. Preferably a minimum distance x between thefirst front attachment zone 140 and the first rear attachment zone 160is larger than 3 mm more preferably larger than 5 mm. The capillarybridging zone B further extends between the second front attachment zone150 and the second rear attachment zone 170, such that upon wetting ofthe absorbent material, a front and rear channel are created at saidsecond front and rear attachment zone 150, 170, respectively, whereinthe capillary bridging zone B further extends between said front andrear channel. Preferably a minimum distance x between the second frontattachment zone 150 and the second rear attachment zone 170 is largerthan 3 mm more preferably larger than 5 mm.

The use of at least one bridging zone B can improve the structure andintegrity of the absorbent article. For example, the use of at least onebridging zone B may improve the formation of a tub-shape upon wetting ofthe absorbent article, see also FIG. 12 which shows the absorbentarticle in the wetted state. In the illustrated embodiment the at leastone bridge zone B is located in the crotch region, preferably in thethird or fourth zone.

The chassis of the diaper 100 in FIGS. 1A-1D comprises a liquid pervioustopsheet (not shown in FIGS. 1C and 1D, but the topsheet is a layerabove top core wrap sheet 110) and liquid impervious backsheet (notshown in FIGS. 1C and 1D, but the backsheet is a layer below back corewrap sheet 110). The topsheet may be attached to the top core wrap sheet110. e.g. in the attachment zones 140, 150, 160, 170. Also, thebacksheet may be attached to the back core wrap sheet 120, e.g. in theattachment zones 140, 150, 160, 170. Preferably the chassis furtherincludes side panels or ears 210, elasticized leg cuffs 230 and elasticwaist elements (not shown). A front end portion of diaper 100 isconfigured as a front waist region 100 a. The opposite rear end portionis configured as a back waist region 100 b of diaper 100. Anintermediate portion of diaper 100 is configured as crotch region CR,which extends longitudinally between first and second waist regions 100a and 100 b. Waist regions 100 a and 100 b may include elastic waistelements such that they gather about the waist of the wearer to provideimproved fit and containment. Crotch region CR is that portion of diaper100 which, when the diaper 100 is worn, is generally positioned betweenthe wearer's legs. The periphery of diaper 100 is defined by the outeredges of the diaper 100 in which longitudinal edges 101, 102 rungenerally parallel to a longitudinal axis of diaper 100 and transverseend edges 103, 104 run between the longitudinal edges 101, 102 generallyparallel to a transverse axis of diaper 100. The chassis also comprisesa fastening system, which may include at least one fastening or securingmember 212 and at least one landing zone 220. The various componentswithin diaper 100 may be bound, joined or secured by any method known inthe art, for example by adhesives in uniform continuous layers,patterned layers or arrays of separate lines, spirals or spots. Top corewrap sheet, topsheet, back core wrap sheet, backsheet, absorbentmaterial and other components may be assembled in a variety ofwell-known configurations and are well known in the art.

Backsheet covers absorbent core 130 and preferably extends beyond theabsorbent core 130 toward longitudinal edges 101, 102 and end edges 103,104 of diaper 100 and may be joined with top sheet. Backsheet preventsbodily exudates absorbed by the absorbent core 130 and contained withindiaper 100 from soiling other external articles that may contact thewearer, such as bed sheets and undergarments. In preferred embodiments,backsheet is substantially impervious to bodily exudates and comprises alaminate of a nonwoven and a thin plastic film such as a thermoplasticfilm. Backsheet may comprise breathable materials that permit vapor toescape from diaper 100 while still preventing bodily exudates frompassing through backsheet. It may be semi-rigid, non-elastic and can bemade fully or partially elasticized and include backing.

The top sheet which is located above the top core wrap sheet 110, ispreferably soft, exhibits good strikethroughs and has a reduced tendencyto rewet from the liquid absorbent material. Top sheet may be semi-rigidand non-elastic, or may be fully or partially elasticized. Topsheet isintended to be placed in close proximity to the skin of the wearer whendiaper 100 is worn. Topsheet permits bodily exudates to rapidlypenetrate it so as to flow more quickly toward absorbent core 130 via atop surface thereof and via the plurality of channels 140, 150, 160,170, preferably not allowing such bodily exudates to flow back throughtopsheet. Topsheet may be constructed from any one of a wide range ofliquid and vapor permeable, preferably hydrophilic, materials. The upperand lower surface of topsheet may be treated differently. Topsheet mayinclude e.g. a surfactant on the upper surface so as to facilitateliquid transfer there through, especially at a central zone or area oftopsheet located over absorbent core 130, and/or a hydrophobic agent onthe lower surface to minimize the liquid contained within absorbent core130 from contact wetting topsheet thereby reducing rewet values.Topsheet may be coated with a substance having rash preventing or rashreducing properties. Preferably, topsheet covers substantially theentire wearer facing area of diaper 100, including substantially all offront waist region 100 a, back waist region 100 b, and crotch region CR.Optionally, side panels 210, 210′ and/or waist feature layers of theinner region may be formed from the same single topsheet material.Alternatively, topsheet may be formed from multiple different materialswhich vary across of topsheet. Such a multiple piece design allows forcreation of preferred properties and different zones of the topsheet.

Absorbent core 130 may comprise any absorbent material that is generallycompressible, conformable, non-irritating to the wearers skin, andcapable of absorbing and retaining bodily exudates. Absorbent core 130may comprise a wide variety of liquid absorbent materials commonly usedin absorbent articles. Preferably, absorbent core 130 comprises fluffmaterial, typically cellulosic fluff pulp. However, in otherembodiments, absorbent core 130 may be substantially fluffless andcomprise superabsorbent polymers. Also, absorbent core 130 may comprisea combination of cellulosic fluff pulp and superabsorbent polymers.Absorbent core 130 may be configured to extend substantially the fulllength and/or width of diaper 100. However, as in the embodiment ofFIGS. 1A-1D, preferably absorbent structure 130 is not coextensive withthe entire diaper 100 and is limited to certain regions of diaper 100including crotch region CR. In various embodiments, the absorbent core130 extends to the edges of diaper 100 but the absorbent material isconcentrated in the crotch region CR or another target zone of thediaper 100. In FIGS. 1A-1D, absorbent core 130 is shown as having asubstantially rectangular configuration, however, absorbent core 130 maybe shaped differently, such as, elliptical, dogbane shaped, T-shaped orI-shaped. More in particular the width of the front portion 130 a may besmaller than the width of the rear portion 130 b of the absorbent core.

Examples of commonly occurring absorbent materials used for absorbentcore 130 are cellulosic fluff pulp, tissue layers, highly absorbentpolymers (so called superabsorbents), absorbent foam materials,absorbent nonwoven materials or the like. It is common to combinecellulosic fluff pulp with superabsorbent polymers in an absorbent core.Superabsorbent polymers are water-swellable, water-insoluble organic orinorganic materials capable of absorbing at least about 20 times itsweight and in an aqueous solution containing 0.9 weight percent ofsodium chloride.

Diaper 100) may also utilize a pair of containment walls or cuffs 230.Each cuff 230 is a longitudinally extending wall structure preferablypositioned on each side of absorbent core 130 and spaced laterally fromthe center line CL. Preferably, cuffs 230 are attached, for example, byadhesive or sonic bonding to the lower structure. Preferably, cuffs 230are equipped with elastic members. When released or otherwise allowedrelaxing, the elastic members retract inwardly. When diaper 100 is worn,the elastic members function to contract cuffs 230 about the buttocksand the thighs of the wearer in a manner, which forms a seal betweendiaper 100, the buttocks and the thighs.

The waist regions 100 a and 100 b each comprise a central region and apair of side panels or ears 210, 210′ which typically comprise the outerlateral portions of the waist regions. These side panels 210, 210′ maybe unitary with the chassis or may be attached or joined thereto by anymeans know in the art. Preferably, the side panels 210 positioned in theback waist region 100 b are flexible, extensible and/or elastic in atleast the lateral direction. In another embodiment the side panels 210are non-elastic, semi-rigid, rigid and/or stiff. In order to keep diaper100 in place about the wearer, preferably at least a portion of the backwaist region 100 b is attached by fastening or securing members 212 toat least a portion of the front waist region 100 a. The fastening orsecuring members 212 may be e.g. adhesive, mechanical fasteners, hookand loop features, conceivable strings and/or combinations thereof. Thefastening or securing members 212 may also be co-adhesive such that theyadhere to each other but not other materials. Preferably the materialsmaking up the fastening or securing members 212 are flexible, extensibleand/or elastic, allowing them to better conform to the shape andmovements of the body and thus, to reduce the likelihood that thefastening system will irritate or injure the wearer's skin.Alternatively, the absorbent article may be pants and the like. In thisconfiguration, the absorbent article may or may not have fasteningmembers.

Diaper 100 may also employ additional layers, such as an acquisitionlayer and/or dispersion layer situated between topsheet and absorbentcore 130, and/or coverstock layers, and/or other layers situated betweenabsorbent core 130 and backsheet. An acquisition layer and/or dispersionlayer serves to slow down the flow so that the liquid has adequate timeto be absorbed by absorbent core 130. FIGS. 9A and 9B show anacquisition layer 190 above top core wrap layer 110.

Diaper 100 may also include such other features, components and elementsas are known in the art including waistbands, waist cap features,elastics and the like to provide better fit, containment and aestheticcharacteristics. These features may be assembled in a variety ofwell-known configurations and are well known in the art.

FIGS. 2A and 2B

FIGS. 2A and 2B illustrate another exemplary embodiment of a diaper 100.Diaper 100 comprises a liquid pervious topsheet, a liquid imperviousbacksheet, and an absorbent core 130 positioned in between topsheet andbacksheet. Absorbent core 130 has a first and second longitudinal edge131, 132 and a first and second transverse edge 133, 134. Absorbentarticle 100 is provided at the top core wrap sheet 110 with a first anda second attachment zone 145, 155 for creating a first and secondchannel 140, 150 located a distance d12 of each other. First and secondchannel 140, 150 each extend from a crotch region CR in the direction ofthe first transverse edge 133 and the second transverse edge 134. Inthis embodiment, preferably, first and second channel extend over morethan 80% of the length of absorbent core 130. Preferably the distanced12 is between 10 mm and 50 mm, more preferably between 15 and 30 mm.Preferably, the length of the first and second channel is substantiallythe same, more preferably the length l1 of the first channel and thelength l2 of the second channel is between 100 mm and 300 mm, morepreferably between 100 mm and 250 mm. Preferably, the distance betweenthe first/second attachment zone 145, 155 and the transverse edge 133 isbetween 50 and 125 mm, more preferably between 75 and 115 mm, and thedistance between the first/second attachment zone 145, 155 and thetransverse edge 134 is between 50 and 125 mm, more preferably between 75and 115 mm.

First channel 140 and second channel 150 are substantially parallel andrun in the longitudinal direction of absorbent core 130. However, it isalso possible for first and second channel 140, 150 to extend under asmall angle with respect to the longitudinal direction of absorbent core130, e.g. an angle between 5 and 10°. For example, first and secondchannel 140, 150 may be diverging slightly outwardly in the direction offirst transverse edge 133 and may be diverging slightly outwardly in thedirection of second transverse edge 134. Preferably first channel 140and second channel 150 are arranged symmetrically with respect to alongitudinal center line CL of absorbent core 130.

Absorbent article 100 is further provided with a third and a fourthchannel 160, 170 located a distance d34 of each other. Third and fourthchannel 160, 170 each extend from crotch region CR in the direction offirst and second transverse edge 134. The distance d12 between first andsecond channel 140, 150 is different from the distance d34 between thirdand fourth channel 160, 170.

Preferably the distance d34 is between 25 mm and 85 mm, more preferablybetween 35 mm and 55 mm. Preferably, the length of the third and fourthchannel 160, 170 is substantially the same, more preferably the lengthl3 of the third channel and the length l4 of the fourth channel isbetween 50 mm and 150 mm, more preferably between 60 mm and 140 mm.Preferably, the distance between the third attachment zone 165 and thefirst longitudinal side 131 is between 10 and 30 mm, and the distancebetween the second attachment zone 175 and the second longitudinal side132 is between 10 and 30 mm.

Third channel 160 and fourth channel 170 are substantially parallel andrun in the longitudinal direction of absorbent core 130. However, it isalso possible for third and fourth channel 160, 170 to extend under asmall angle with respect to the longitudinal direction of absorbent core130, e.g. an angle between 5 and 10°. For example, third and fourthchannel 160, 170 may be diverging slightly outwardly in the direction offirst transverse edge 133 and second transverse edge 134.

Preferably third channel 160 and fourth channel 170 are arrangedsymmetrically with respect to a longitudinal center line CL of absorbentcore 130.

In this embodiment, first, second, third and fourth channel 140, 150,160, 170 each have a bottom 145, 155, 165, 175, similar to the bottomillustrated in FIG. 1C and FIG. 1D for the first embodiment of FIGS.1A-1D. At bottom 145, 155, 165, 175 top core wrap sheet 110 is attachedto back core wrap sheet 120 as described previously. Outside of theplurality of channels 140, 150, 160, 170, absorbent core 130 has amaximum thickness t. Preferably, each channel 140, 150, 160, 170 extendsthrough at least 90% of the maximum thickness of absorbent core 130,more preferably through 100% of the thickness of absorbent core 130,such that, in the channel 140, 150, 160, 170, substantially no absorbentmaterial is present that between top core wrap sheet 110 and back corewrap sheet 120.

Absorbent core 130 has a front portion 130 a extending at one side of atransverse crotch line T. and a rear portion 130 b extending at theother side of the transverse crotch line T. First, second, third andfourth channel 140, 150, 160, 170 each extend both in front portion 130a and rear portion 130 b of absorbent core 130. Preferably the distanced12 between first and second channel 140, 150 is smaller than thedistance d34 between third and fourth channel 160, 170, and the lengthl1 of first and second channel 140, 150 is bigger than the length l3 ofthird and fourth channel 160, 170. Such a channel pattern has theadvantage that liquid can be distributed over substantially the entireabsorbent core 130, and that any leakage risks in various positions ofthe wearer can be reduced.

The plurality of channels 140, 150, 160, 170 together cover at least60%, preferably at least 70% of the length la of absorbent core 130;indeed, in the embodiment of FIGS. 1A-1D the channels cover a lengthequal to 11 which is more than 70% of the length la of absorbent core130. The plurality of channels 140, 150, 160, 170 may be indicated in acolor and/or with a pattern which is different from the color and/orpattern of topsheet. More in particular the area of the channels maycomprise a print allowing a user to visually distinguish the channels.For example, an area of the topsheet above front portions of channels140, 150, 160, 170 may be printed with an ink of a first color and anarea of the topsheet above rear portions the channels 140, 150, 160, 170may be printed with a different color. In that manner a user will beable to easily recognize the front and rear portion of a diaper, andwill recognize more easily how to put on the diaper. Topsheet, backsheetand absorbent core 130 may have the same features as described above inconnection with FIGS. 1A-1D.

FIG. 3

FIG. 3 illustrates a variant of diaper 100 of FIGS. 1A-1D. The featuresand characteristics are similar with this difference that a fifthchannel 180 is provided in top core wrap sheet 110, in between third andfourth channel 160, 170 and extending along a longitudinal center lineof diaper 100. Further, the first and second channels are slightlylonger and extend over transverse fold line L in the direction of secondtransverse edge 134. The third and fourth channel are slightly shortercompared to the embodiment of FIGS. 1A-1D. By the additional channel 180the distribution of the liquid can be further improved, especially forlarger absorbent articles. Preferably, in the plurality of attachmentzones 140, 150, 160, 170, 180 the top core wrap sheet is attached to theback core wrap sheet, and preferably substantially no absorbent materialis present. Seen in a longitudinal direction of the absorbent core 130,looking from the front edge 133 to the rear edge 134, the absorbent core130 comprises subsequently a first, second, third, fourth and fifth zoneZ1, Z2, Z3, Z4, Z5.

The absorbent core 130 comprises a front portion 130 a extending betweenthe front edge 133 and a transverse crotch line L of the absorbent core,and a rear portion 130 b extending between the rear edge 134 and thetransverse crotch line L of the absorbent core 130. The first, secondand third zone Z1, Z2, Z3 extend in the front portion 130 a of theabsorbent core and the fourth and fifth zone Z4, Z5 extend in the rearportion 130 b. Preferably, in said first and fifth zone Z1, Z5substantially no permanent attachment zones are present. However thefirst and/or fifth zone Z1, Z5 may comprise temporary secondaryattachments that loosen upon wetting.

The second zone Z2 comprises a first and a second permanent elongatefront attachment zone 130, 140, said first and second front attachmentzones 130, 140 extending from an edge of the first zone Z1 in thedirection of the third zone Z3, and here even into the fourth zone.

The fourth zone Z4 comprises a first, second and third rear elongateattachment zone 160, 170, 180 said first and second rear attachment zoneextending from an edge of the fifth zone Z5 in the direction of thethird zone Z3.

At least one of said second, third and fourth zone comprises a bridgingzone B allowing a liquid flow F between the first and the second sideedge 131, 132 by capillary action through the absorbent material. Thebridging zone B extends between the first front attachment zone 140 andthe first rear attachment zone 160, such that upon wetting of theabsorbent material, a front and rear channel are created at said firstfront and rear attachment zone 140, 160, respectively, wherein thebridging zone B extends between said front and rear channel. Preferablya minimum distance x between the first front attachment zone 140 and thefirst rear attachment zone 160 is larger than 3 mm more preferablylarger than 5 mm. The bridging zone B further extends between the secondfront attachment zone 150 and the second rear attachment zone 170, suchthat upon wetting of the absorbent material, a front and rear channelare created at said second front and rear attachment zone 150, 170,respectively, wherein the bridging zone B further extends between saidfront and rear channel. Preferably a minimum distance x between thesecond front attachment zone 150 and the second rear attachment zone 170is larger than 3 mm more preferably larger than 5 mm.

FIGS. 4-6

FIG. 4 illustrates a further variant of diaper 100 of FIGS. 1A-1D. Thefeatures and characteristics are similar with this difference that thefirst and second channels are slightly longer and extend over transversefold line L in the direction of second transverse edge 134, in betweenthird and fourth channel 160, 170. Depending on the shape and size ofthe absorbent article, the distribution of the liquid and the creationof the cup/tub shape can be further improved by this additional length.Also in FIG. 4 five zones Z1, Z2, Z3, Z4, Z5 can be distinguished withsimilar properties as those described above for FIG. 3.

FIG. 5 illustrates a variant of diaper 100 of FIG. 4. The features andcharacteristics are similar with this difference that first channel 140is connected to third channel 160 through a first transverse channelportion 147 and that second channel 150 is connected to fourth channel170 through a second transverse channel portion 157. In that manner anyliquid can flow from the first channel 140 to the third channel 160 andvice versa, and liquid can flow from the second channel 150 to thefourth channel 170 and vice versa, resulting in an even betterdistribution of the liquid.

Also, channel portions 147, 157 may help in creating the tub shape uponwetting of the absorbent core 130. Preferably first and second channel140, 150 extend in a longitudinal direction of absorbent core 130 over alength which is longer than the length of third and fourth channel 160,170, wherein third and fourth channel extend between crotch region CRand second transverse edge 134 and first and second channel extendbetween crotch region CR and first transverse edge 133. Also in FIG. 5five zones Z1, Z2, Z3, Z4, Z5 can be distinguished with similarproperties as those described above for FIG. 3. It is noted that in theembodiment of FIG. 5 e.g. the channel portions 147, 157 could beprovided in the form of temporary attachment portions which graduallyloosen upon wetting in order to created a bridging zone for a liquidflow from one side edge 131 to the other side edge 132 and vice versa.

FIG. 6 illustrates another more basic exemplary embodiment of a diaper100 according to the invention. Diaper 100 comprises a liquid pervioustopsheet, a liquid impervious backsheet, and an absorbent core 130positioned in between topsheet and backsheet. Absorbent core 130 has afirst and second longitudinal edge 131, 132 and a first and secondtransverse edge 133, 134. Absorbent article 100 is provided with a firstand a second attachment zone for creating a first and a second channel140, 150 located a distance d12 of each other, upon wetting of thediaper 100. First and second channel 140, 150 each extend from a crotchregion CR in the direction of the first transverse edge 133 and thesecond transverse edge 134. In this embodiment, preferably, first andsecond channel extend over more than 80% of the length of absorbent core130. Preferably the distance d12 is between 10 mm and 90 mm, morepreferably between 20 mm and 80 mm, even more preferably between 30 mmand 50 mm. Preferably, the length of the first and second channel issubstantially the same, more preferably the length l1 of the firstchannel and the length l2 of the second channel is between 100 mm and350 mm, more preferably between 150 mm and 300 mm. Preferably, thedistance between the first channel 140 and the first longitudinal side131 is between 10 mm and 30 mm, and the distance between the secondchannel 150 and the second longitudinal side 132 is between 10 mm and 30mm. Preferably, the distance between the first/second channel 140, 150and the transverse edges 133, 134 is between 20 mm and 100 mm, morepreferably between 30 mm and 75 mm.

First channel 140 and second channel 150 are substantially parallel andrun in the longitudinal direction of absorbent core 130. However, it isalso possible for first and second channel 140, 150 to extend under asmall angle with respect to the longitudinal direction of absorbent core130, e.g. an angle between 5 and 10°. For example, first and secondchannel 140, 150 may be diverging slightly outwardly in the direction offirst transverse edge 133 and may be diverging slightly outwardly in thedirection of second transverse edge 134. Preferably first channel 140and second channel 150 are arranged symmetrically with respect to alongitudinal center line CL of absorbent core 130.

First and second channel 140, 150 may each have a bottom 145, 155,similar to the bottom illustrated in FIG. 1C for the first embodiment ofFIGS. 1A-1D. However, it is noted that the channels 140, 150, 160, 170may be located below and/or above the attachment zones 145, 155, 165,175, as will be explained in more detail below with reference to FIG.14.

At the attachment zones 145, 155, 165, 175 top core wrap sheet 110 isattached to back core wrap sheet 120 as described previously. Outside ofthe plurality of channels 140, 150, 160, 170 absorbent core 130 has amaximum thickness t. Preferably, in the unwetted state, each channel140, 150, 160, 170 extends through at least 90% of the maximum thicknessof absorbent core 130, more preferably through 100% of the thickness ofabsorbent core 130, such that, in the channel 140, 150, 160, 170,substantially no absorbent material is present between top core wrapsheet 110 and back core wrap sheet 120.

The areas of the channels 140 and/or 150 and/or 160 and/or 170 may beindicated in a color and/or with a pattern which is different from thecolor and/or pattern of topsheet. More in particular the area of thechannels may comprise a print allowing a user to visually distinguishthe channels. This print may be arranged on the topsheet, on the topcore wrap sheet, on the back core wrap sheet, on the backsheet, or onany sheet in between the topsheet and the backsheet, as long as it isvisible for a user. Preferably the print is visible when looking at thetopsheet of the diaper.

For example, a front portion of the channel 140 and/or 150 and/or 160and/or 170 may be indicated with an ink of a first color and a rearportion the channels 140 and/or 150 and/or 160 and/or 170 may beindicated with a different color. In that manner a user will be able toeasily recognize the front and rear portion of a diaper. Indeed, theuser will know that the first color has to be on the left and the secondcolor on the right. Hence he will recognize more easily how to put onthe diaper. Topsheet, backsheet and absorbent core 130 may have the samefeatures as described above in connection with FIGS. 1A-1D.

FIGS. 7-8

FIGS. 7 and 8 illustrate baby pants variants of the baby diaperembodiments of FIGS. 1A and 2A. In the embodiments of FIGS. 7 and 8 theside panels 210, 210′ are larger compared to the embodiments of FIGS. 1Aand 2A. It is clear to the skilled person that any embodiment describedin view of baby diapers, is applicable in a similar manner to babypants, mutatis mutandis.

FIGS. 10 and 10A-H

FIG. 10 illustrates an embodiment of a method for manufacturing anabsorbent article according to the invention. The method comprises in afirst step guiding a first sheet material 110 along an optional guideroller 5, and further along a rotating member 10, wherein a surface 15of said rotating member 10 is provided with a pattern with suction zones13, 13′ and non-suction zones 11, 12; 11′, 12′. The first sheet material110 is shown in a transparent manner to reveal the suction andnon-suction zones of the rotating member 10. The suction zones 13, 13′may be provided with holes, and the non-suction zones 11, 12; 11′, 12′are formed of closed material. For example, the non-suction zones 11,12; 11′, 12′ may be provided with inserts as shown in FIG. 10A. As shownin FIG. 1A, the inserts 11, 12; 11′, 12′, may have a trapezoidal crosssection. FIG. 10B shows an insert pattern with four non-suction zones 11a, 11 b, 12 a, 12 b per absorbent core. The inserts may be fixed e.g.with screws on the rotating member 10. At an inner area of the rotatingmember 10 a vacuum is applied, see VACUUM 1. The non-suction zones 11,12; 11′, 12′ comprise at least a first elongate zone 11, 11′ and asecond elongate zone 12, 12′ extending in a circumferential direction ofthe rotating member 10. In a second step an absorbent material F isapplied via a hopper 40 on said first sheet material 110 on the rotatingmember 10 such that the suction zones 13, 13′ are covered with absorbentmaterial and substantially no absorbent material is present on thenon-suction zones 11, 12; 11′, 12′. In a third step a second sheetmaterial 120 is applied on top of the absorbent material on the firstsheet material 110. e.g. using a further rotating member 20. This isshown also in FIG. 10C where a cross section through the absorbent coreis shown during the application of the second sheet material 120. FIG.10D shows the cross section of the absorbent core downstream of rotatingmember 10. One of said first and second sheet material is a top corewrap sheet material, and the other one is a back core wrap sheetmaterial. In the illustrated embodiment it is assumed that the firstsheet material 110 is the top core wrap sheet material. In a fourth stepthe first sheet material 110 is attached to the second sheet material120 at least in the areas where substantially no absorbent material ispresent, and such that at least a first and a second channel 140, 150are formed in said top core wrap sheet material 110. The attaching maybe done by applying pressure and heat on the top core wrap sheetmaterial 110 and/or on the back core wrap sheet material 120 in theareas where substantially no absorbent material is present, e.g. by arotating member 30 and/or opposite rotating member 30′ which is providedwith at least a first and a second seal rib 31, 32 dimensioned forapplying pressure and heat on the top core wrap sheet material 110 inthe areas where substantially no absorbent material is present in orderto create the first and second channel 140, 150, respectively.

While the above-described method of manufacturing absorbent articles hasgood results, the top core wrap sheet and the back core wrap sheet maynot be sufficiently strongly attached to one another, especially incases where a significant amount of liquid is absorbed. Therefore, itmay be desirable to additionally use a binder, such as glue, tostrengthen the bond between the top and back core wrap sheets.

It is however inadvisable to apply this binder to the entire surfacearea of the wrap sheet being guided over rotating member 10, since thismay lead to the absorbent material and/or binder contaminating theattachments zones 140, 150, 160, 170, and therefore hindering theformation of channels.

Therefore it is advantageous to use a specific method to apply the glueto the back and/or top wrap sheets. In FIGS. 10E-10H, a manufacturingmethod including application of a binder is demonstrated which does nothave this drawback.

In particular, taking as an example the possible manufacturing processfor the embodiment of FIGS. 1A and 1B, while the first sheet material110 is being guided along an optional guide roller and further along arotating member a binder, such as glue, may first be applied to thefirst sheet material, but only in substantially parallel stripes whichdo not overlap with the intended locations of the attachment zones 140,150, 160, 170. Note that in this embodiment, the first sheet materialforms the bottom core wrap, but in other embodiments this can also bethe top core wrap. The skilled person will be aware of various method ofbinder/glue application, such as spraying, contact application and soon.

FIG. 10E shows a possible pattern for the application of glue to thefirst sheet material, which will be the back core wrap. In particular,in this example there are three stripes 111, 111′, 111″, but a differentnumber of substantially parallel stripes, either continuous,intermittent and/or discontinuous in the longitudinal direction, mayalso be chosen depending on the shape and locations of the attachmentzones 140, 150, 160, 170, which preferably cover a substantial portionof the surface of the bottom core wrap while not overlapping with theintended location of the attachment zones, and preferably while keepingsome distance from the intended location of the attachment zones.Although. FIG. 10E illustrates an application pattern of stripes, it isclear to the skilled person that the application pattern can be adaptedand tuned depending on the intended shape, configuration and location ofthe one or more attachment zones. Moreover, the skilled person will knowhow to best adapt the binder application zones on the first and secondsheet materials 110, 120 for other configurations of attachments zones,such as the ones described in the present application. Preferably, theapplication of the glue to the bottom core wrap takes place while thebottom core wrap is moved towards the rotating number, and before theabsorbent material is added to it. In such a way, the sheet material onthe rotating member is already provided with binder, and maysubsequently have absorbent material attached thereto via the hopper.

Please note that the dotted line indicating the intended location of theattachment zones is there for illustrative purposes only; it does notcorrespond to anything on the first sheet material 110.

FIG. 10F shows application of glue to the second sheet material 120,which in this case will become the top core wrap. In this case too theapplication of the binder preferably happens along substantiallyparallel stripes 121, 121′, which preferably are complementary to thestripes on the first sheet material 110. Preferably, the application ofglue to the top core wrap sheet happens at a distance from hopper 40, tominimize the chance of contamination, i.e. absorbent material stickingto the areas that are to become attachment zones 140, 150, 160, 170. Forinstance, the binder may be applied before or while the sheet materialis guided along further rotating member 20. Note that here, too, thedotted lines merely indicate the intended position of the attachmentzones 140, 150, 160, 170; they do not indicate any interruption orchange in the binder application. As before, the skilled person will beaware of various method of binder/glue application, such as spraying,contact application and so on.

FIG. 10G shows the result after the third step described above has takenplace, i.e. after the second sheet material 120, which here is the topcore wrap sheet, is applied on top of the absorbent material on thefirst sheet material 110, e.g. using a further rotating member 20. Notethat the pattern fill indicates the presence of binder, and not thepresence of absorbent material, since the absorbent material will not bepresent in the areas indicated by the dotted lines. These areas will bebonded together in a fourth step such as described above, such thatchannels 140, 150, 160 and 170 are formed in said back core wrap sheetmaterials 110 and/or 120, for instance by applying pressure and heat onthe back core wrap sheet material 110 and/or on the top core wrap sheetmaterial 120 in the areas where substantially no absorbent material ispresent, e.g. by a rotating member 30 and/or opposite rotating member30′ which is provided with at least a first and a second seal rib 31, 32dimensioned for applying pressure and heat in between the core wrapsheet materials 110 and 120 in the areas where substantially noabsorbent material is present in order to create the channels 140, 150,160 and 170.

Finally, FIG. 10H shows the absorbent article resulting from theabove-described method, in which a further step has taken place oftraversal sealing in bands 122, 122′ by chemical, thermal or physicalbinding such as for in stance glue, heat and/or pressure, which preventsthe core from opening up and the front and the back. Note that this stepof transversal sealing may also take place prior to the fourth step.

The above-described method may yield an absorbent article with higherdry and especially wet integrity and which avoids unwanted migration ofabsorbent material, while avoiding the risk of contamination in theattachment zones 140, 150, 160 and 170 which may impede the formation ofchannels. The skilled person will understand that this method is notlimited to this particular configuration of attachment zones and willknow how to best adapt the binder application zones on the first andsecond sheet materials 110, 120 for other configurations, such as theones described in the present application. More in particular theskilled person understands that the method is also useful for absorbentcores with only one attachment zone or with more than two attachmentzones.

FIGS. 11A-11E

FIG. 11A illustrates an exemplary embodiment of an absorbent core 130with four attachment zones creating channels 140, 150, 160, 170. In theembodiment of FIG. 11A, the attachment zones are formed by welding thetop core wrap sheet 110 to the back core wrap sheet 112. This weldingmay be done according to a predetermined sealing pattern. In theembodiment of FIG. 11A, the pattern consists of a plurality of discreteshapes 143, here a plurality of squares. Preferably, the discrete shapes143 have dimensions smaller than 2 mm. Preferably, the distance betweenadjacent discrete shapes is between 0.5 and 3 mm.

FIG. 11B illustrates another exemplary embodiment of a sealing patternthat may be used in an embodiment of the invention. Here the patternconsists of a plurality of discrete shapes in the form of roundedelements 143. The rounded elements may have a length dimension between0.5 mm and 5 mm, and a width dimension between 0.5 mm and 5 mm.Preferably, the discrete shapes are equally distributed in theattachment zones.

FIG. 11C illustrates yet another embodiment where the sealing patternconsists of discrete shapes which are rounded. In this embodiment, threecolumns of rounded discrete elements 143 are used for each attachmentzone 140, 150, 160, 170.

FIG. 11D illustrates another exemplary embodiment of an attachment zonefor creating a channel 140, 150, 160, 170. In this embodiment, theattachment zone is formed by a plurality of continuous line-shapedattachments 140 a, 140 b, 140 c. The number of lines used may vary, andmay be e.g. two lines or more than three adjacent lines. Preferably, thedistance w between a first line 140 a and a last line 140 c is at least1 mm, more preferably at least 2 mm, even more preferably more than 4mm.

In the exemplary embodiment of FIG. 11E, the attachment zones creatingchannels 140, 150, 160, 170 may be formed of a plurality of discreteelements 143, wherein each discrete element has a width w which coversthe entire width w of the attachment zone.

FIGS. 13A-B and 12

FIG. 13A illustrates an exemplary embodiment of a traditional absorbentcore. When a traditional absorbent core absorbs liquid, the core becomesbulky such that the diaper is no longer well adapted to the body. Theliquid does not spread evenly but remains in the center of the absorbentcore. FIG. 13B illustrates an exemplary embodiment of an absorbent coreof the invention. Thanks to the attachment zones and associated channels140, 150, 160, 170, the liquid is evenly spread, resulting in theformation of tubes 301, 302, 303 which provide a tub shape to theabsorbent core 130. Such a tub shape adapts perfectly to the body.Further, compared to prior art solutions, the liquid is kept in animproved manner absorbed in the absorbent core 130, and the risk onleakage is reduced. Also, because of the creation of the channels 140,150, 160, 170, the liquid is absorbed faster. FIG. 12 shows aperspective view of a diaper in the wetted state. FIG. 12 clearlyillustrates the formation of three tubes 301, 302, 303 giving the diapera tub shape which is well adapted to the body. Preferably absorbent core130 is provided with a plurality of attachment zones 140, 150, 160, 170where the top core wrap sheet is attached to the back core wrap sheet,and where preferably substantially no absorbent material is present.Seen in a longitudinal direction of the absorbent core 130, looking fromthe front edge 133 to the rear edge 134, the absorbent core 130comprises subsequently a first, second, third, fourth and fifth zone Z1,Z2, Z3, Z4, Z5.

The absorbent core 130 comprises a front portion 130 a extending betweenthe front edge 133 and a transverse crotch line L of the absorbent core,and a rear portion 130 b extending between the rear edge 134 and thetransverse crotch line L of the absorbent core 130. The first, secondand third zone Z1, Z2, Z3 extend in the front portion 130 a of theabsorbent core and the fourth and fifth zone Z4, Z5 extend in the rearportion 130 b. Preferably, in said first and fifth zone Z1, Z5substantially no permanent attachment zones are present. However thefirst and/or fifth zone Z1, Z5 may comprise temporary secondaryattachments that loosen upon wetting. The second zone Z2 comprises afirst and a second permanent elongate front attachment zone 130, 140,said first and second front attachment zones 130, 140 extending from anedge of the first zone Z1 in the direction of the third zone Z3.

The fourth zone Z4 comprises a first and second rear elongate attachmentzone 160, 170, said first and second rear attachment zone extending froman edge of the fifth zone Z5 in the direction of the third zone Z3.

The first and second rear elongate attachment zones 160, 170 extend fromthe fourth zone into the third zone Z3 so that an absorbent article isformed that fits well to the body of the wearer. Preferably a distancebetween the transverse crotch line L and a transverse center line Textending perpendicular on the longitudinal direction of the absorbentcore, through the middle of the absorbent core, is smaller than 10%,more preferably smaller than 5% of the length of the absorbent core.

The first zone Z1 extends over a length corresponding with at least 5%,preferably at least 10% of the length la of the absorbent core seen inthe longitudinal direction, e.g. between 10% and 20%. The fifth zone Z5extends over a length corresponding with at least 10% of the length laof the absorbent core seen in the longitudinal direction, preferably atleast 20%, more preferably at least 25%, e.g. between 20% and 40%.

Preferably the second, the third and/or the fourth zone Z1, Z2, Z3 eachextends over a length corresponding with at least 10% of the length laof the absorbent core seen in the longitudinal direction, preferably atleast 15%, e.g. between 10% and 20% of the length of the absorbent core.Preferably the first front attachment zone 140 and the second frontattachment zone 150 are arranged symmetrically with respect to alongitudinal center axis CL of the absorbent core 130. Preferably aminimum distance d12 between the first and the second front attachmentzone is between 20 mm and 70 mm, more preferably between 30 mm and 60mm, even more preferably between 40 mm and 55 mm. As explained in thesummary, such a configuration is especially suitable for male persons.

Preferably the first rear attachment zone 160 and the second rearattachment zone 170 are arranged symmetrically with respect to thelongitudinal center axis CL of the absorbent core. Preferably thedistance d34 between the first and the second rear attachment zone 160,170 is between 10 mm and 50 mm, more preferably between 15 mm and 40 mm,even more preferably between 20 mm and 30 mm.

A first smallest distance d12 between the first and the second frontattachment zone 140, 150 is bigger than a second smallest distance d34between the first and the second rear attachment zone 160, 170. Thefirst and the second front attachment zone 140, 150 extend in alongitudinal direction of the absorbent core over a length l1 which isless than the length l3 of the first and second rear attachment zone.Preferably, the length l1 of the first and second front attachment zone140, 150 is larger than 30 mm, more preferably larger than 40 mm, evenmore preferably larger than 50 mm.

The plurality of attachment zones 140, 150, 160, 170 may be permanentattachment zones which remain attached when wetted. The plurality ofattachment zones may extend, seen in the transverse direction of theabsorbent core, over the transverse distance which is at least 1 mm,preferably at least 3 mm, more preferably at least 4 mm, even morepreferably at least 5 mm, most preferably at least 6 mm.

FIG. 14

FIG. 14 illustrates an absorbent core 130 comprising an absorbentmaterial 105 between a top core wrap sheet 110 and a back core wrapsheet 120. The absorbent core has a first and second longitudinal edge131, 132. The absorbent core 130 is provided with a plurality ofattachment zones 145. FIG. 14 illustrates that the attachment zones 145may be positioned at different locations. As illustrated on the left inFIG. 14, the attachment zone may be positioned more or less centrallysuch that an upper channel portion 140 a and a lower channel portion 140b is formed. In an alternative embodiment, the attachment zone 145 maybe positioned at the bottom such that an upper channel 140 is created,see the example in the middle of FIG. 14. According to yet anotherembodiment, the attachment zone 145 may be located at the top, such thatthe channel 140 is formed below top core wrap sheet 110. The skilledperson understands that any variants thereof are also possible, as longas the attachment zones allow the formation of channels upon wetting ofthe absorbent core 130.

Although the method is illustrated for two channels, the skilled personunderstands that the method can be adapted for forming three, four ormore channels, and in particular for manufacturing any one of theabsorbent articles disclosed in the present application.

FIGS. 15A-15X, 16A-16S, 17A-17V and 18A-G

FIGS. 15A-15X, 16A-16S, 17A-17V and 18A-F illustrate multipleadvantageous positions for the attachment zones in an absorbent coreaccording to the invention. Preferably the absorbent core of thoseexamples is provided with a plurality of attachment zones where the topcore wrap sheet is attached to the back core wrap sheet, and wherepreferably substantially no absorbent material is present. Seen in alongitudinal direction of the absorbent core, looking from the frontedge to the rear edge, the absorbent core comprises subsequently afirst, second, third, fourth and fifth zone Z1, Z2, Z3, Z4, Z5, asillustrated. The principles about the zones set out above for variousembodiments may also be applied in the embodiments of FIGS. 15A-15X,16A-16S, 17A-17V and 18A-F. In possible embodiments, although notillustrated, small portions of the attachment zones of FIGS. 15A-15X,16A-16S, 17A-17V may be unattached to create one or more bridging zones.More generally, the bridging zone may comprise one or more temporaryattachments between the top and back core wrap sheet which areconfigured to detach when wetted; and/or at one or more permanentattachment zones in a direction from the first to the second side edge;and/or absorbent material in order to make a transverse capillary flowand/or mass flow possible. According to the exemplary embodiment of FIG.15A the plurality of attachment zones comprises a first attachment zone140, a second attachment zone 150, a third attachment zone 160 and afourth attachment zone 170, and a central attachment zone 180. The firstand second attachment zones 140 diverge from the central attachment zone180 in the crotch region in the direction of a rear transverse edge ofabsorbent core. The third and fourth attachment zone 160, 170 divergefrom the central attachment zone 180 in the crotch region in thedirection of a front transverse edge of absorbent core.

The embodiment of FIG. 15A can be used for both male and female. In theembodiment of FIG. 15A the first attachment zone 140 and the secondattachment zone 150 form together a substantially V-shaped zone. Thissubstantially V-shaped zone comprises a first elongate attachment zone140′ (indicated as a solid fill area), a second elongate attachment zone150′ (indicated as a solid fill area), and a V-shaped connectingattachment zone 1045 (indicated as a hatched area). The first and secondelongate attachment zone 140′, 150′ extend next to each other from thecrotch region in the direction of the rear transverse edge 134. Theconnecting attachment zone 1045 connects said first elongate attachmentzone 140′ with said second attachment zone 150′. The connectingattachment zone 1045 is a front connecting attachment zone whichconnects a front end portion of the first attachment zone 140′ to acorresponding front end portion of the second attachment zone 150′.Similarly, the third attachment zone 160 and the fourth attachment zone170 form together a substantially V-shaped zone. This substantiallyV-shaped zone 160, 170 comprises a third elongate attachment zone 160′,a fourth elongate attachment zone 170′, and a V-shaped connectingattachment zone 1065. The third and fourth elongate attachment zone160′. 170′ extend next to each other from the crotch region in thedirection of the front transverse edge 133. The connecting attachmentzone 1065 connects said third elongate attachment zone 160′ with saidfourth elongate attachment zone 170′. The connecting attachment zone1065 is a rear connecting attachment zone which connects a rear endportion of the third attachment zone 160′ to a corresponding rear endportion of the fourth attachment zone 170. The V-shaped zone 160, 170guides the liquid from left and right parts of the front portion. Asillustrated the first interconnecting attachment zone 1065 may bearranged in the front portion, and more in particular in the second zoneZ2, and the second interconnecting attachment zone 1045 may be arrangedin the rear portion, and in particular in the fourth zone Z4. Byconnecting the first interconnecting attachment zone 1065 with thesecond interconnecting attachment zone 1045 in the crotch region with acentral longitudinal attachment zone 180 a convenient liquiddistribution channel network is created allowing the liquid to bedistributed rapidly throughout the absorbent core.

According to the exemplary embodiment of FIG. 15B the plurality ofattachment zones comprises a first attachment zone 140, a secondattachment zone 150, a third attachment zone 160 and a fourth attachmentzone 170. This embodiment is similar to the embodiment of FIG. 2A-2B,with this difference that the outer attachment zones 160, 170 are longerthan the inner attachment zones 140, 150. The embodiment of FIG. 15B canbe used for both male and female.

According to the exemplary embodiment of FIG. 15C the plurality ofattachment zones comprises a first attachment zone 140, a secondattachment zone 150, a third attachment zone 160 and a fourth attachmentzone 170, and a central attachment zone 180. The first and thirdattachment zones 140, 160 are aligned in the longitudinal direction.Also, the second and fourth attachment zones 150, 170 are aligned andextend substantially parallel to the first and third attachment zones140, 160. The embodiment of FIG. 15C can be used for both male andfemale.

According to the exemplary embodiment of FIG. 15D the plurality ofattachment zones comprises a first attachment zone 140 and a secondattachment zone 150. The first and second attachment zones 140 aresubstantially parallel in the crotch region and diverge in the directionof a front transverse edge of absorbent core. The embodiment of FIG. 15Dis preferable for female.

According to the exemplary embodiment of FIG. 15E the plurality ofattachment zones comprises a first attachment zone 140 and a secondattachment zone 150. The first and second attachment zones 140 partiallyoverlap in the crotch region and diverge in the direction of a reartransverse edge of absorbent core. The embodiment of FIG. 15E ispreferable for a female. The embodiment of FIG. 15E is preferable forfemale.

In the embodiment of FIG. 15E the first attachment zone 140 and thesecond attachment zone 150 form together a substantially V-shaped zone.This substantially V-shaped zone comprises a first elongate attachmentzone 140′ (indicated as a solid fill area), a second elongate attachmentzone 150′ (indicated as a solid fill area), and a V-shaped connectingattachment zone 1045 (indicated as a hatched area). The first and secondelongate attachment zone 140′, 150′ extend next to each other from thecrotch region in the direction of the rear transverse edge 134, and moreparticularly in the fourth and third zone Z4 and Z3. The connectingattachment zone 1045 connects said first elongate attachment zone 140′with said second attachment zone 150′. The connecting attachment zone1045 is a front connecting attachment zone which connects a front endportion of the first attachment zone 140′ to a corresponding front endportion of the second attachment zone 150′. The V-shaped zone 140, 150guides the liquid from the front portion to the left and right parts ofthe rear portion. As illustrated the first interconnecting attachmentzone 1045 may be arranged in the front portion and more in particular inthe second zone Z2. In that manner a convenient liquid distributionchannel network is created allowing the liquid to be distributed rapidlythroughout the absorbent core.

According to the exemplary embodiment of FIG. 15F the plurality ofattachment zones comprises a first longitudinal attachment zone 140 anda second longitudinal attachment zone 150 which are interconnected by anattachment portion 1045 in a rear portion of the absorbent core. In thatmanner any leakage via the rear portion can be reduced or avoided. Theembodiment of FIG. 15F is preferable for female.

In the embodiment of FIG. 15F the first attachment zone 140, the secondattachment zone 150 and the connecting attachment zone 1045 formtogether a substantially U-shaped zone. This substantially U-shaped zonecomprises a first elongate attachment zone 140 (indicated as a solidfill area), a second elongate attachment zone 150 (indicated as a solidfill area), and a curved connecting attachment zone 1045 (indicated as ahatched area). The first and second elongate attachment zone 140, 150extend next to each other from the crotch region in the direction of thefront transverse edge 133 and in the direction of the rear transverseedge 134, and more particularly in the fourth, third and second zone Z4,Z3 and Z2. The connecting attachment zone 1045 connects said firstelongate attachment zone 140 with said second attachment zone 150. Theconnecting attachment zone 1045 is a rear connecting attachment zonewhich connects a rear end portion of the first attachment zone 140 to acorresponding rear end portion of the second attachment zone 150. TheU-shaped zone 140, 150, 1045 guides the liquid from the left and rightparts of the front portion to the rear portion. As illustrated the firstinterconnecting attachment zone 1045 may be arranged in the rear portionand more in particular in the fourth zone Z4. In that manner aconvenient liquid distribution channel network is created allowing theliquid to be distributed rapidly throughout the absorbent core.

According to the exemplary embodiment of FIG. 15G the plurality ofattachment zones comprises a first longitudinal attachment zone 140, asecond longitudinal attachment zone 150, and a transverse attachmentzone 1045 in a front portion of the absorbent core. The transverseattachment zone 1045 substantially connects a front end of firstlongitudinal attachment zone 140 and a front end of second longitudinalattachment zone 150. As illustrated the first interconnecting attachmentzone 1045 may be arranged in the rear portion and more in particular inthe fourth zone Z4. According to the exemplary embodiment of FIG. 15Hthe plurality of attachment zones comprises a first longitudinalattachment zone 140, a second longitudinal attachment zone 150, acentral longitudinal attachment zone 180. The first and secondlongitudinal attachment zones 140, 150 extend adjacent to each otherfrom the crotch region to a rear transverse edge of the absorbent core.The central longitudinal attachment zone 180 extends from the crotchregion in the direction of the front transverse edge of the absorbentcore. The embodiment of FIG. 15H is preferable for male. The first and asecond attachment zone 140, 150 extend next to each other from a crotchregion in the direction of the front edge, and the third attachment zone180 extends from the crotch region in the direction of the rear edge,wherein seen in a projection on a transverse direction the thirdattachment zone 180 is located between the first and the secondattachment zone 140, 150. Seen in a projection on a longitudinaldirection of the absorbent article 130, a projection of the first andsecond attachment zone 140, 150 does not overlap with a projection ofthe third attachment zone. The exemplary embodiment of FIG. 15I issimilar to the embodiment of FIG. 15H, with this difference that thecentral attachment zone 180 extends also from the crotch region in thedirection of the rear transverse edge, partially in between the firstand second attachment zone 140, 150. The embodiment of FIG. 15I ispreferable for male. The first and a second attachment zone 140, 150extend next to each other from a crotch region in the direction of thefront edge, and the third attachment zone 180 extends from the crotchregion in the direction of the rear edge, wherein seen in a projectionon a transverse direction the third attachment zone 180 is locatedbetween the first and the second attachment zone 140, 150. Seen in aprojection on a longitudinal direction of the absorbent article 130, aprojection of the first and second attachment zone 140, 150 partiallyoverlaps with a projection of the third attachment zone 180.

According to the exemplary embodiment of FIG. 15J the plurality ofattachment zones comprises a first longitudinal attachment zone 140 anda second longitudinal attachment zone 150 which are interconnected by anattachment portion 1045′ in a front portion of the absorbent core and anattachment portion 1045 in a rear portion of the absorbent core. In thatmanner any leakage via the front and rear portion can be reduced oravoided. The embodiment of FIG. 15I can be used for both male andfemale.

In the embodiment of FIG. 15J the first attachment zone 140, the secondattachment zone 150 and two connecting attachment zones 1045, 1045′ formtogether a substantially rectangular attachment zone. This substantiallyrectangular attachment zone comprises a first elongate attachment zone140, a second elongate attachment zone 150, and two curved connectingattachment zones 1045, 1045′. The first and second elongate attachmentzone 140, 150 extend next to each other from the crotch region in thedirection of the front transverse edge 133 and in the direction of therear transverse edge 134, and more particularly in the fourth, third andsecond zone Z4, Z3 and Z2. The connecting attachment zone 1045 is a rearconnecting attachment zone which connects a rear end portion of thefirst attachment zone 140 to a corresponding rear end portion of thesecond attachment zone 150. The connecting attachment zone 1045 islocated in the fourth zone Z4. The connecting attachment zone 1045′ is afront connecting attachment zone which connects a front end portion ofthe first attachment zone 140 to a corresponding front end portion ofthe second attachment zone 150. The connecting attachment zone 1045′ islocated in the second zone Z2. In that manner a convenient liquiddistribution channel network is created allowing the liquid to bedistributed rapidly throughout the absorbent core.

According to the exemplary embodiment of FIG. 15K the plurality ofattachment zones comprises a first attachment zone 140, a secondattachment zone 150, a third attachment zone 160 and a fourth attachmentzone 170, and a central attachment zone 180. The first and secondattachment zones 140, 150 extend adjacent to each other from a crotchregion in the direction the rear transverse edge. Also, the third andfourth attachment zones 160, 170, as well as the central attachment zone180 extend adjacent to each other from a crotch region in the directionthe front transverse edge. In that manner the distribution of liquid inthe front portion of the absorbent core can be further enhanced. Theembodiment of FIG. 15K is preferable for male. The first and a secondelongate attachment zone 140, 150 extend next each other, at least inthe rear portion of the absorbent core in the direction of the reartransverse edge, and the third and fourth elongate attachment zone 160,170 extend next to each other, at least in the front portion of theabsorbent core, in the direction of the front edge. Measured in atransverse direction, a first maximum distance between the first and thesecond attachment zone 140, 150 is smaller than a second maximumdistance between the third and the fourth attachment zone 160, 170.

According to the exemplary embodiment of FIG. 15L the plurality ofattachment zones comprises a first longitudinal attachment zone 140, asecond longitudinal attachment zone 150, and a central longitudinalattachment zone 180. The first and second longitudinal attachment zones140, 150 extend adjacent to each other over at least 60% of the lengthof the absorbent core. The central longitudinal attachment zone 180extends between the first and second attachment zones 140, 150, from thecrotch region in the direction of the rear transverse edge of theabsorbent core. The embodiment of FIG. 15L can be used for both male andfemale.

According to the exemplary embodiment of FIG. 15M the plurality ofattachment zones comprises a first longitudinal attachment zone 140, asecond longitudinal attachment zone 150, a central rear longitudinalattachment zone 180 a, and a central front longitudinal attachment zone180 b. The first and second longitudinal attachment zones 140, 150extend adjacent to each other over at least 60% of the length of theabsorbent core. The central rear and front longitudinal attachment zones180 a, 180 b extends between the first and second attachment zones 140,150, in a rear and front portion of the absorbent core, respectively.The embodiment of FIG. 15M can be used for both male and female.

According to the exemplary embodiment of FIG. 15N the plurality ofattachment zones comprises a first attachment zone 140, a secondattachment zone 150, and a central attachment zone 180. The first andsecond attachment zones 140 diverge from the crotch region in thedirection of a front and rear transverse edge of absorbent core. Thecentral attachment zone is provided in between the first and secondattachment zone 140, 150, mainly in a front portion of the absorbentcore. The embodiment of FIG. 15N can be used for both male and female.

According to the exemplary embodiment of FIG. 15O the plurality ofattachment zones comprises a first longitudinal attachment zone 140, asecond longitudinal attachment zone 150, and a central longitudinalattachment zone 180. The first and second longitudinal attachment zones140, 150 extend adjacent and parallel to each other in the crotchregion. The central longitudinal attachment zone 180 extends between thefirst and second attachment zones 140, 150, over at least 60% of thelength of the absorbent core. The embodiment of FIG. 15O can be used forboth male and female. According to the exemplary embodiment of FIG. 15Pthe plurality of attachment zones comprises a first attachment zone 140and a second attachment zone 150. The first and second attachment zones140, 150 extend from the crotch region in the direction of a front andrear transverse edge of absorbent core, and are curved such that thefirst and second attachment zones 140, 150 cross each other at a firstcrossing point in a front portion of the absorbent core and in a secondcrossing point in the rear portion of the absorbent core. The embodimentof FIG. 15P can be used for both male and female.

In the embodiment of FIG. 15P a first elongate attachment zone 140′, asecond elongate attachment zone 150′ and two connecting attachment zones1045, 1045′ form together a substantially 0-shaped attachment zone. Thissubstantially 0-shaped attachment zone comprises the first elongateattachment zone 140′, the second elongate attachment zone 150′, and twoV-shaped connecting attachment zones 1045, 1045′. The first and secondelongate attachment zone 140′, 150′ extend next to each other from thecrotch region in the direction of the front transverse edge 133 and inthe direction of the rear transverse edge 134, and more particularly inthe fourth, and third zone Z4, Z3. The connecting attachment zone 1045is a rear connecting attachment zone which connects a rear end portionof the first attachment zone 140′ to a corresponding rear end portion ofthe second attachment zone 150′. The connecting attachment zone 1045 islocated in the fourth zone Z4. The connecting attachment zone 1045′ is afront connecting attachment zone which connects a front end portion ofthe first attachment zone 140′ to a corresponding front end portion ofthe second attachment zone 150′. The connecting attachment zone 1045′ islocated in the second zone Z2. Further a first and second V-shapedattachment zone 2001, 2002 may be provided at a rear side and front sideof the substantially 0-shaped attachment zone 140′, 150′, 1045, 1045′.In that manner a convenient liquid distribution channel network iscreated allowing the liquid to be distributed rapidly throughout theabsorbent core.

According to the exemplary embodiment of FIG. 15Q the plurality ofattachment zones comprises a first longitudinal attachment zone 140, asecond longitudinal attachment zone 150, a third attachment longitudinalzone 160 and a fourth longitudinal attachment zone 170. The first andsecond attachment zones 140, 150 extend from the crotch region in thedirection of the rear transverse edge, and are interconnected viatransverse attachment portions 147, 157 to third and fourth attachmentzone 160, 170 extending from the crotch region to the front transverseedge, respectively. The embodiment of FIG. 15Q is preferable for female.

The exemplary embodiment of FIG. 15R is similar to the embodiment ofFIG. 15G with this difference that two parallel transverse attachmentzones 1045 a and 1045 b are provided in the front region of theabsorbent core. The embodiment of FIG. 15R can be used for both male andfemale. According to the exemplary embodiment of FIG. 15S the pluralityof attachment zones comprises a first attachment zone 140, a secondattachment zone 150, a third attachment zone 160 and a fourth attachmentzone 170. The first and second attachment zones 140, 150 diverge fromthe crotch region in the direction of a front and rear transverse edgeof absorbent core. The third and fourth attachment zones 160, 170 arelocated outwardly of the first and second attachment zones 140, 150, areshorter than the first and second attachment zones 140, 150, and alsodiverge from the crotch region in the direction of a front and reartransverse edge of absorbent core. In that manner, in the wetted state,a plurality of tubes is created, wherein the tubes are smaller in acenter of the crotch region and gradually widen in the direction of thefront and rear transverse edge of the absorbent core. In that manner theshape of the tub which is formed in the wetted state can be furtherimproved to fit well to the body. The embodiment of FIG. 15S can be usedfor both male and female.

According to the exemplary embodiment of FIG. 15T the plurality ofattachment zones comprises a first longitudinal attachment zone 140 anda second longitudinal attachment zone 150, wherein front end portions140′. 150′ thereof diverge in the direction of the front transverse edgeof the absorbent core. The embodiment of FIG. 15T is preferable forfemale.

According to the exemplary embodiment of FIG. 15U the plurality ofattachment zones comprises a first longitudinal attachment zone 140, asecond longitudinal attachment zone 150, a third longitudinal attachmentzone 160 and a fourth longitudinal attachment zone 170, and a centrallongitudinal attachment zone 180. The first and second attachment zones140, 150, as well as the central attachment zone 180 extend adjacent toeach other from a crotch region in the direction the front transverseedge. Also, the third and fourth attachment zones 160, 170 extendadjacent to each other from a crotch region in the direction the reartransverse edge. In that manner the distribution of liquid in the frontportion of the absorbent core can be further enhanced. The embodiment ofFIG. 15U is preferable for female.

According to the exemplary embodiment of FIG. 15V the plurality ofattachment zones comprises a first longitudinal attachment zone 140, asecond longitudinal attachment zone 150, and a central longitudinalattachment zone 180. The first and second attachment zones 140, 150extend adjacent to each other from a crotch region in the direction thefront transverse edge. The central attachment zone 180 extends from acrotch region in the direction the rear transverse edge. The embodimentof FIG. 15V can be used for both male and female.

The exemplary embodiment of FIG. 15W is similar to the embodiment ofFIG. 15V with this difference that the central attachment zone 180extends partially in between the first and the second attachment zone140, 150. The embodiment of FIG. 15W can be used for both male andfemale. The exemplary embodiment of FIG. 15X is similar to theembodiment of FIG. 15V with this difference that the central attachmentzone 180 extends all the way in between the first and the secondattachment zone 140, 150 in the direction of the front transverse edge.The embodiment of FIG. 15X can be used for both male and female.

According to the exemplary embodiment of FIG. 16A the plurality ofattachment zones comprises a first attachment zone 140 and a secondattachment zone 150. The first and second attachment zones 140 aresubstantially parallel in a rear part of the crotch region, whilst thetransverse distance between the first and second attachment zonesgradually increases in the direction of a front transverse edge ofabsorbent core. The embodiment of FIG. 16A is preferable for female.

According to the exemplary embodiment of FIG. 16B the plurality ofattachment zones comprises a first attachment zone 140 and a secondattachment zone 150. The first and second attachment zones 140 partiallyoverlap in a front part of the crotch region, whilst the transversedistance between the first and second attachment zones graduallyincreases in the direction of a rear transverse edge of absorbent core.The embodiment of FIG. 16B is preferable for female. FIG. 16B is similarto the embodiment of FIG. 15E with this difference that the elongateattachment zones 140′, 150′ are shorter and that the connecting zone1045 comprises a longer longitudinal section extending from the secondzone Z2 to the third zone Z3 into the fourth zone Z4 where the elongateattachment zones 140′, 150′ are located.

According to the exemplary embodiment of FIGS. 16C and 16D the pluralityof attachment zones comprises a first longitudinal attachment zone 140,a second longitudinal attachment zone 150, a third attachmentlongitudinal zone 160 and a fourth longitudinal attachment zone 170. Thefirst and second attachment zones 140, 150 extend from the crotch regionin the direction of the rear transverse edge (FIG. 16D) or in thedirection of the front transverse edge (FIG. 16C), and areinterconnected via transverse attachment portions 147, 157 to third andfourth attachment zone 160, 170 extending from the crotch region to thefront transverse edge (FIG. 16D) or in the direction of the reartransverse edge (FIG. 16C), respectively. In FIG. 16C the distancebetween the first and second attachment zones is smaller than thedistance between the third and fourth attachment zones, whilst in FIG.16D the distance between the first and second attachment zones is biggerthan the distance between the third and fourth attachment zones. Theembodiment of FIG. 16E is similar to the embodiment of FIG. 16D withthis difference that the third and fourth attachment zones overlap in afront portion of the absorbent core. The embodiments of FIGS. 16C and16E are preferable for female. The embodiment of FIG. 16D is preferablefor male. The first and a second elongate attachment zone 140, 150extend next to each other in the rear portion of the absorbent core inthe direction of the rear transverse edge, and the third and fourthelongate attachment zone 160, 170 extend next to each other in the frontportion of the absorbent core, in the direction of the front edge.Measured in a transverse direction, a first maximum distance between thefirst and the second attachment zone 140, 150 is smaller than a secondmaximum distance between the third and the fourth attachment zone 160,170.

FIG. 16E is similar to the embodiment of FIG. 15E with this differencethat the connecting zone 1045 is a rear connecting zone extending in thefourth zone Z4, whilst the elongate attachment zones 140′, 150′ arelocated mainly in the second and third zone Z2 and Z3. The embodiment ofFIG. 16F is similar to the embodiment of FIG. 15U with this differencethat the third and fourth longitudinal attachment zones 160, 170 areinterconnected at their rear end by a transverse attachment zone 1045.The embodiment of FIG. 16F is preferable for female.

The embodiment of FIG. 16G is similar to the embodiment of FIG. 15B withthis difference that the third and fourth longitudinal attachment zones160, 170 have end portions which diverge outwardly in the direction ofthe front transverse edge and the rear transverse edge of the absorbentcore. The embodiment of FIG. 16G can be used for both male and female.

The embodiment of FIG. 16H is similar to the embodiment of FIG. 15O withthis difference that the first and second attachment zones 140, 150 haveend portions which diverge outwardly in the direction of the fronttransverse edge and the rear transverse edge of the absorbent core. Theembodiment of FIG. 16H can be used for both male and female.

The embodiment of FIG. 16I is similar to the embodiment of FIG. 15C withthis difference that the first, second, third and fourth attachmentzones 140, 150, 160, 170 are shorter such that in a central part of thecrotch region only central attachment zone 180 is present. Theembodiment of FIG. 16I can be used for both male and female.

The embodiment of FIG. 16J is similar to the embodiment of FIG. 16I withthis difference that the two central attachment zones 180 are providedbetween first and third attachment zones 140, 160 and second and fourthattachment zones 150, 170. The embodiment of FIG. 16J can be used forboth male and female.

The embodiments of FIGS. 16K and 16L the plurality of attachment zonescomprises a first longitudinal attachment zone 140, a secondlongitudinal attachment zone 150, a third attachment longitudinal zone160 and a fourth longitudinal attachment zone 170. The first and secondattachment zones 140, 150 extend from the crotch region in the directionof the front transverse edge. The third and fourth attachment zone 160,170 extend from the crotch region to the rear transverse edge. Thedistance between the first and second attachment zones 140, 150 isbigger than the distance between the third and fourth attachment zones160, 170. In FIG. 16K the third and fourth attachment zones 160, 170extend partially between the first and second attachment zones 140, 150,whilst in FIG. 16L, seen in the longitudinal direction, the third andfourth attachment zones 160, 170 are at a distance of the first andsecond attachment zones 140, 150. The embodiments of FIG. 16K and FIG.16L are preferable for female.

In the embodiments of FIGS. 16M, 16N and 16O the plurality of attachmentzones comprises a first longitudinal attachment zone 140, a secondlongitudinal attachment zone 150, and outwardly diverging attachmentzones 160, 170 in a front portion of the absorbent core. In FIG. 16M,additionally a central attachment zone 180 is provided between the firstlongitudinal attachment zone 140 and the second longitudinal attachmentzone 150. The embodiments of FIGS. 16M, 16N and 160 are preferable forfemale.

FIG. 16P is similar to the embodiment of FIG. 16H with this differencethat first and second attachment zones are provided more to the front ofabsorbent core. The embodiment of FIG. 16P can be used for both male andfemale.

In the embodiment of FIG. 16Q the plurality of attachment zonescomprises a first longitudinal attachment zone 140 and a secondlongitudinal attachment zone 150 which extend over at least 60° % of thelength of the absorbent core. The first longitudinal attachment zone 140and the second longitudinal attachment zone 150 are each provided at afront end and at a rear end with an outwardly directed transverseportion. In that manner leakage risks at the front and rear portions ofthe absorbent core can be further reduced. The embodiment of FIG. 16Qcan be used for both male and female.

FIG. 16R is similar to the embodiment of FIG. 15B. The embodiment ofFIG. 16R can be used for both male and female.

In the embodiment of FIG. 16S the plurality of attachment zonescomprises a first undulated attachment zone 140 and a second undulatedattachment zone 150 each extending over at least 60% of the length ofthe absorbent core. The undulations will increase the length of thechannels 140, 150, further improving the liquid distribution in theabsorbent core. The embodiment of FIG. 16S can be used for both male andfemale.

FIGS. 17A-17V and FIGS. 18A-18G illustrate yet other exemplaryembodiments of an absorbent core according to the invention.

FIGS. 17A, 17B, 17H and 17K illustrate that the first and secondattachment zones 140, 150 may comprise curved portions. FIGS. 17C, 17D,17E, 17F, 17G, 17J, 17L, 17M, 17N, 17O, 17P, 17Q, 17R, 17S, 17T, 17U,17V illustrate that various patterns are possible with one or morelongitudinal sections 140, 150, 160, 170, 180, and/or one or moreinclined sections 160, 170, 160 a, 160 b, 170 a, 170 b and/or one ormore transverse sections 1045, 1045 a, 1045 b, 1045 c. FIG. 17Iillustrates that also curved transverse sections 1045 a, 1045 b may beused. The embodiments of FIGS. 17A, 17B, 17D, 17G, 17E, 17G, 17H, 17I,17G, 17K, 17L, 17M, 17O, 17Q, 17R and 17S can be used for both male andfemale. The embodiments of FIGS. 17C, 17N and 17P are preferable formale. The embodiments of FIGS. 17F, 17T, 17U and 17V are preferable forfemale. These embodiments illustrate that the liquid distribution may befurther enhanced using transverse permanent or semi-permanent attachmentzones and/or additional longitudinal attachment zones.

In the embodiment of FIG. 17H the first attachment zone 140 and thesecond attachment zone 150 form together two substantially V-shapedzones. A first substantially V-shaped zone is located in a rear portion(and in particular in the fourth zone Z4) and comprises a first elongateattachment zone 140′ (indicated as a solid fill area), a second elongateattachment zone 150′ (indicated as a solid fill area), and a V-shapedconnecting attachment zone 1045 (indicated as a hatched area). The firstand second elongate attachment zone 140′. 150′ extend next to each otherfrom the crotch region in the direction of the rear transverse edge 134and diverge in the direction of the rear transverse edge 134. Theconnecting attachment zone 1045 connects said first elongate attachmentzone 140′ with said second elongate attachment zone 150′. The connectingattachment zone 1045 is a front connecting attachment zone whichconnects a front end portion of the first attachment zone 140′ to acorresponding front end portion of the second attachment zone 150′.Similarly, a third elongate attachment zone 140″, a fourth elongateattachment zone 150″ and a connecting attachment zone 1045′ formtogether a second substantially V-shaped zone located in a front portionof the absorbent core and more in particular in the second and thirdzone Z2, Z3. This second substantially V-shaped zone 140″, 150″, 1045′may be joined to the first substantially V-shaped zone 104′, 150′, 1045.In the illustrated embodiment the connecting attachment zones 1045,1045′ are connected at or near the transverse crotch line L. The thirdand fourth elongate attachment zone 140″, 150″ extend next to each otherfrom the crotch region in the direction of the front transverse edge 133and diverge in this direction. The connecting attachment zone 1045′connects said third elongate attachment zone 140″ with said fourthelongate attachment zone 150″. The connecting attachment zone 1045′ is arear connecting attachment zone which connects a rear end portion of thethird attachment zone 140″ to a corresponding rear end portion of thefourth attachment zone 150″. The first and second V-shaped zones guidethe liquid from left and right parts of the front portion towards therest of the absorbent core. As illustrated the first interconnectingattachment zone 1045′ may be arranged in the front portion, and more inparticular in the third zone Z3, and the second interconnectingattachment zone 1045 may be arranged in the rear portion, and inparticular in the fourth zone Z4. By connecting the firstinterconnecting attachment zone 1045 with the second interconnectingattachment zone 1045′ in the crotch region a convenient liquiddistribution channel network is created allowing the liquid to bedistributed rapidly throughout the absorbent core.

In the embodiment of FIG. 17K the first attachment zone 140 and thesecond attachment zone 150 form together two “O”-shaped zones between afirst and a second substantially V-shaped zone. The first V-shaped zonecomprises elongate attachment zones 140 a, 150 a interconnected by aconnecting attachment zone 1045 a. The first O-shaped zone compriseselongate attachment zones 140 b, 150 b interconnected by connectingattachment zones 1045 a′, 1045 b. The second O-shaped zone compriseselongate attachment zones 140 c, 150 c interconnected by connectingattachment zones 1045 b′, 1045 c. The second V-shaped zone compriseselongate attachment zones 140 d, 150 d interconnected by a connectingattachment zone 1045 c′.

FIGS. 18A-18G illustrate further embodiments. In FIG. 18A the first tofourth attachment zones are similar to the first to fourth attachmentzones of FIG. 16I, but instead of a central rectilinear attachment zone,there is provided an oval attachment zone 180 in the crotch region,between the first and second attachment zone 140, 150 and the third andfourth attachment zone 160, 170.

FIGS. 18B, 18C, 18D illustrate that various patterns are possible withone or more longitudinal sections and/or one or more inclined sectionsand/or one or more transverse sections as described before. FIGS. 18E,18F. 18G illustrate that the first and second attachment zones 140, 150may comprise various rectilinear sections which are oriented at an anglewith respect to the longitudinal direction of the absorbent core. Theembodiments of FIGS. 18A, 18B, 18C, 18D, 18E, 18F and 18G can be usedfor both male and female.

In the embodiment of FIG. 18B the first attachment zone 140 and thesecond attachment zone 150 are interconnected by a plurality oftransverse connecting attachment zones comprising a front connectingattachment zone 1045′, a rear connecting attachment zone 1045, and aplurality of intermediate connecting attachment zones 1045 a, 1045 b,1045 c, 1045 d. The number of intermediate connecting attachment zonesmay be dependent on the size of the absorbent core. Preferably the firstand second elongate attachment zone extend from the fourth to the secondzone. Optionally one or more longitudinal intermediate attachment zones180 may be provided. In the embodiment of FIG. 18B the first attachmentzone 140 and the second attachment zone 150 form two V-shaped attachmentzones, similar to the embodiment of FIG. 17H but with straight zones140, 150.

In the embodiment of FIG. 18F the absorbent core 130 comprises anabsorbent material between a top core wrap sheet and a back core wrapsheet, said absorbent core 130 being positioned in between the topsheetand the backsheet of the absorbent article. The absorbent core 130 has afirst and second longitudinal edge 131, 132 and a first and secondtransverse edge 133, 134. The absorbent core 130 has a longitudinalcenter line CL dividing the absorbent core 130 in a first longitudinalportion and a second longitudinal portion on either side of thelongitudinal center line. The absorbent core 130 has a transverse crotchline L dividing the absorbent core 130 in a front portion 130 a and arear portion 130 b on either side of the transverse crotch line L. Theabsorbent core 130 is provided with a plurality of attachment zones 140,150 where the top core wrap sheet is attached to the back core wrapsheet.

The plurality of attachment zones 140, 150 comprises a first elongateattachment zone 140 crossing the longitudinal center line CL in a firstcrossing point CP1, in said front portion 130 a and/or in said rearportion 130 b, from the first longitudinal portion to the secondlongitudinal portion. In the illustrated embodiment the first crossingpoint is located at a distance dx of the transverse crotch line L, herein the front portion 130 a. However, in other embodiments the firstcrossing point CP1 may be located in the rear portion 130 b of theabsorbent core 130. In yet other embodiments, the first crossing pointCP1 may also be located on the transverse crotch line L, i.e. at theborder of the front portion 130 a and the rear portion 130 b. Theplurality of attachment zones 140, 150 comprises a second elongateattachment zone 150 crossing said longitudinal center line CL in asecond crossing point CP2, in said front portion 130 a and/or in saidrear portion 130 b, from the second longitudinal portion to the firstlongitudinal portion. In the illustrated embodiment of FIG. 18F, thefirst and second crossing point CP1, CP2 are the same point. Theposition of the first and second crossing point CP1, CP2 (and inparticular the distance dx) may be optimized in function of whether theabsorbent article is intended for a male or female.

Preferably, the distance between the first and/or second crossing pointCP1. CP2 and the transverse crotch line is larger than 1% of the lengthof the absorbent core, more preferably larger than 2%, even morepreferably larger than 3%. Preferably, the distance between the firstand/or second crossing point CP1, CP2 and the transverse crotch line issmaller than 20% of the length of the absorbent core, more preferablysmaller than 10%.

A distance between the transverse crotch line L and a transverse centerline T extending perpendicular on the longitudinal direction of theabsorbent core, through the middle of the absorbent core, is smallerthan 10%, more preferably smaller than 5% of the length of the absorbentcore. The transverse center line T is not shown in FIG. 18F but is drawnin FIG. 27B.

Preferably, the first elongate attachment zone 140 extends both in thefront portion 130 a and in the rear portion 130 b and the secondelongate attachment zone 150 extends both in the front portion 130 a andin the rear portion 130 b. Preferably, the first elongate attachmentzone 140 and the second elongate attachment zone 140 are arrangedsymmetrically with respect to the longitudinal center line CL of theabsorbent core 130.

Preferably, a maximum distance dmaxf, dmaxr between the first and thesecond elongate attachment zone 140, 150 is between 15 and 70% of thewidth of the absorbent core, more preferably between 20 and 50%. Amaximum distance dmaxf between the first and the second attachment zone140, 150 in the front portion 130 a may be different from a maximumdistance dmaxr between the first and the second attachment zone 140, 150in the rear portion 130 b. Preferably, the length of the first andsecond attachment zone is larger than 10% of the length of the absorbentcore, more preferably larger than 30%, even more preferably larger than50%. Preferably, the attachment zones 140, 150 are permanent attachmentzones which remain attached when wetted. Preferably, said first andsecond attachment zone 140, 150 each extend, seen in the transversedirection of the absorbent core, over the transverse distance which isat least 1 mm, preferably at least 3 mm, more preferably at least 4 mm,even more preferably at least 5 mm, most preferably at least 6 mm.

A front end of the first attachment zone 140 is preferably located inthe second zone Z2, and a rear end of the first attachment zone 140 ispreferably located in the fourth zone Z4. Similarly, a front end of thesecond attachment zone 150 is preferably located in the second zone Z2or in the third zone, and a rear end of the second attachment zone 150is preferably located in the fourth zone Z4, wherein the zone may bedefined as described in the summary.

A similar embodiment is illustrated in FIG. 26B, where the firstelongate attachment zone comprises portions 140, 160, and the secondelongate attachment zone comprises portions 150, 170.

In the embodiments of FIGS. 26A and 26G, the first and second elongateattachment zone 140, 160; 150, 170 may comprise a bridging zone Ballowing a liquid flow between the first and the second longitudinaledge 131, 132 by capillary action through the absorbent material and/orby mass flow, such that upon wetting of the absorbent material, frontchannels 140, 150 and rear channels 160, 170 are created, wherein thebridging zone B extends between said front and rear channels; wherein aminimum distance between said front and rear channel is preferablylarger than 3 mm more preferably larger than 5 mm. The bridging zone Bmay extend from a first portion of the absorbent core to a secondportion of the absorbent core, wherein the first portion is definedbetween the first longitudinal edge 131 and the longitudinal center axisCL of the absorbent core 130 and the second portion is defined betweenthe second longitudinal edge 132 and the longitudinal center axis CL ofthe absorbent core. The bridging zone B may comprise one or moretemporary attachments between the top and back core wrap sheet which areconfigured to detach when wetted; and/or the bridging zone B maycomprise at least one permanent attachment zone in a direction from thefirst to the second longitudinal edge 131, 132; and/or the said bridgingzone B may comprise absorbent material. Preferably, the absorbentmaterial comprises cellulosic fluff pulp and/or superabsorbentparticles.

In the embodiments of FIGS. 18F, 18G, 26A, 26B and 26 G, the first andsecond attachment zone together for a substantially X-shaped zonearranged symmetrically with respect to the longitudinal center line CL.In other embodiments, an X-shaped zone may be combined with differentlyshaped zones, see e.g. FIG. 17G. Also, the X-shaped zone may comprisedcurved portions, see e.g. the embodiments of FIGS. 17H, 21N, 22P, 23U,23V.

In yet other embodiments, multiple X-shaped zones may be combined, seee.g. the embodiments of FIGS. 15P, 17K, 18E. In the embodiment of FIGS.15P and 18E a first X-shaped attachment zone (including V-shaped portion2001 and a front portion of 140′, 150′) is located in the front portion130 a, and a second X-shaped attachment zone (including V-shaped portion2002 and a rear portion of 140′, 150′) is located in the rear portion130 b. The first X-shaped attachment zone is connected to the secondX-shaped attachment zone at the transverse crotch line L. In theembodiment of FIG. 17K a first X-shaped attachment zone (includingportion 1045 c, 1045 c′) is located in the second zone Z2 of the frontportion 130 a, a second X-shaped attachment zone (including portions1045 b, 1045 b) is located in the third zone Z3 of the front portion 130a, and a third X-shaped attachment zone (including portions 1045 a, 1045a′) is located in the fourth zone Z4 of the rear portion 130 b. Thefirst X-shaped attachment zone is connected to the second X-shapedattachment zone, and the second X-shaped attachment zone is connected tothe third X-shaped attachment zone.

FIGS. 19A-19D

FIGS. 19A-19D illustrate further embodiments wherein the absorbent coreis provided with at least a first attachment zone 140, wherein in saidfirst attachment zone 141 said top core wrap sheet is attached to saidback core wrap sheet along an attachment which extends, seen in atransverse and/or longitudinal direction of the absorbent core, over atransverse and/or longitudinal distance which is at least 1 mm,preferably at least 2 mm, more preferably at least 3 mm, most preferablyat least 4 mm; and/or said top core wrap sheet is attached to said backcore wrap sheet along a discontinuous attachment at a plurality oflocations at a distance of each other, seen in the transverse and/orlongitudinal direction of the absorbent core; such that upon wetting ofthe absorbent material, a first channel is created at said firstattachment zone 140. The embodiments of FIGS. 19A, 19B. 19C and 19D canbe used for both male and female.

In the embodiment of FIG. 19A, a single longitudinal attachment zone 140is illustrated, along with a first and second transversal attachmentzone 1045 a, 1045 b which are positioned at either end of thelongitudinal attachment zone 140. The first and second transversalattachment zone 1045 a, 1045 b are illustrated as curved zones, but itis clear to the skilled person that the first and/or second transversalattachment zone may also be provided as straight zones. In theembodiment of FIG. 19B, a single longitudinal attachment zone 140 isillustrated, along with a first and second transversal attachment zone1045 a, 1045 b which are positioned between the attachment zone 140 andthe first transversal edge of the absorbent core. In addition to, oralternative to the embodiment of FIG. 19B the first and secondtransversal attachment zones 1045 a. 1045 b may be positioned betweenthe attachment zone 140 and the second transversal edge of the absorbentcore. In other words, it is clear to the skilled person that e.g. athird and/or fourth transversal attachment zone may be added. In theembodiment of FIG. 19C, a single longitudinal attachment zone 140 isillustrated, along with a first and second transversal attachment zone1045 a, 1045 b which are positioned at either side of the longitudinalattachment zone 140. Although the transversal attachment zones 1045 a.1045 b are illustrated to be connected to the longitudinal attachmentzone 140, it is clear to the skilled person that other embodiments existwherein the transversal attachment zones 1045 a, 1045 b are notconnected to the longitudinal attachment zone 140. In the embodiment ofFIG. 19D, a single longitudinal attachment zone 140 is illustrated. Theillustrated longitudinal attachment zone 140 comprises curved sections,however, in addition or alternatively the longitudinal attachment zone140 may comprise straight sections. It is clear to the skilled personthat any of the earlier described embodiments related to at least twolongitudinal attachment zones, or any combination thereof may be appliedto the embodiments wherein the absorbent core comprises a singlelongitudinal attachment zone.

Since liquid may in many cases not be distributed evenly orsymmetrically, it may be advantageous to include at least one attachmentzone through which liquid may go from the first and second channels 140,150 and vice-versa. This will allow a good distribution over the entireabsorbent core as well as an improved formation of the channels and thetub-shape upon swelling of the absorbent core.

FIGS. 20A-2Z. 21A-1Z, 22A-Z, 23A-23V

In the embodiments of FIGS. 20A-20W, 20Z, 21G-21M, 21O-21T, 21V-21X,21Z, 22D-22M, 22R-22Z, 23A-23L, this is achieved with a transversalattachment zone 1045 connecting the rear ends of longitudinal attachmentzones 140, 150. As will be clear from the figures, the presence of sucha transversal attachment zone 1045 does not preclude the elementsmentioned in conjunction with the previous figures, such as the presenceof a central attachment zone 180 and/or variations of the length,position and/or shape of longitudinal attachment zones 140, 150. Thefigures furthermore show that the presence of such a transversalattachment also does not preclude the presence of third and fourthlongitudinal attachment zones 160, 170, or of transversal attachmentzones 147, 157 which connect the longitudinal attachment zones 140, 150to the further longitudinal attachment zones 160, 170. Furthermore, thefigures show that the transversal attachment zone 1045 need not bestraight: it may be rounded as in for example FIGS. 20A-20D, rounded atthe edges only as for example in FIGS. 20E-20H, or take another shape.In the embodiments of FIGS. 20A-20Z, 21G-Z, 22D-22N, 22R-Z. 23A-23L,23U-V the first attachment zone 140, 160 (where present; in someembodiments the zone is indicated with one reference number 140 and inother embodiments with two reference numbers 140, 160), the secondattachment zone 150, 170 (where present) and the connecting attachmentzone 1045 form together a substantially U-shaped zone. The substantiallyU-shaped zone may extend from the rear portion to the front portion (andin particular from the fourth zone Z4 to the second zone Z2). The firstand second elongate attachment zone 140, 150, 160, 170 (where present)extend next to each other from the crotch region in the direction of therear transverse edge 134 and/or the front transverse edge 133.Optionally the first and second elongate attachment zone 140, 150, 160,170 (where present) may diverge in the direction of the front transverseedge 133. The connecting attachment zone 1045 connects said firstelongate attachment zone 140, 160 (where present) with said secondelongate attachment zone 150, 170 (where present). The connectingattachment zone 1045 may be a front connecting attachment zone whichconnects a front end portion of the first attachment zone to acorresponding front end portion of the second attachment zone (FIG.20X-Y); or a rear connecting attachment zone which connects a rear endportion of the first attachment zone to a corresponding rear end portionof the second attachment zone (FIGS. 20A-W, and 20Z, 21G-21Z). It isnoted that also two U-shaped attachment zones may be provided, see FIGS.21N and 22N, 23U, 23V. The presence of a central attachment zone 180,especially in the front portion may further enhance the liquiddistribution. The length of the central attachment zone 180 ispreferably at least 20% of the length of the first and second elongateattachment zone 140, 150, and is preferably located at least partiallybetween the first and second elongate attachment zone 140, 150.

In the embodiments of FIGS. 20X-20Y, a transversal attachment zone 1045′connects the back ends of longitudinal attachment zones 140, 150. In theembodiments of FIGS. 21A-21F, 22O-22Q. 23M-23P, there are twotransversal attachment zones 1045 and 1045′, respectively connecting thefront and back ends of the longitudinal attachment zones 140, 150, 160,170. In the embodiments of FIGS. 21N, 22N, 23U and 23V, there are twolongitudinal attachment zones 140, 150 positioned toward the front sideof the absorbent core which are connected by a transversal attachmentzone 1045′, 1045 a at their rear ends, as well as two longitudinalattachment zones 160, 170 positioned toward the rear side of theabsorbent core which are connected by a transversal attachment zone1045, 1045 b at their front ends.

In the embodiment of FIGS. 21A-21F. 220-22Q. 23M-23P the firstattachment zone 140, 160 (where present), the second attachment zone150, 170 (where present) and two connecting attachment zones 1045, 1045′form together a substantially rectangular or O-shaped attachment zone.This substantially rectangular attachment zone comprises a firstelongate attachment zone 140, 160 (where present), a second elongateattachment zone 150, 170 (where present), and two straight or curvedconnecting attachment zones 1045, 1045′. The first and second elongateattachment zone 140, 150, 160, 170 (where present) extend next to eachother from the crotch region in the direction of the front transverseedge 133 and/or in the direction of the rear transverse edge 134, andmore particularly in the fourth, third and second zone Z4, Z3 and Z2.The connecting attachment zone 1045 is a rear connecting attachment zonewhich connects a rear end portion of the first attachment zone 140, 160(where present) to a corresponding rear end portion of the secondattachment zone 150, 170 (where present). Preferably, he connectingattachment zone 1045 is located in the fourth zone Z4. The connectingattachment zone 1045′ is a front connecting attachment zone whichconnects a front end portion of the first attachment zone 140 to acorresponding front end portion of the second attachment zone 150.Preferably, the connecting attachment zone 1045′ is located in thesecond zone Z2. In that manner a convenient liquid distribution channelnetwork is created allowing the liquid to be distributed rapidlythroughout the absorbent core.

The connecting between the longitudinal channels need not be done with atransversal channel, but may also be achieved by shaping thelongitudinal channels in a specific way. For example, in the embodimentof FIG. 23R, the four longitudinal attachment zones 140, 150, 160, 170collectively form a diamond shape. Likewise, in the embodiment of FIG.23T, six longitudinal attachment zones 140, 150, 160 a, 170 a, 160 b,170 c are so connected as to form an elongated hexagon shape.Combinations of these two methods of connecting channels are alsopossible. In the embodiment of FIG. 23Q, the longitudinal attachmentzones 140, 150 are connected at their rear ends by a transversalattachment zone 1045 and converge to meet at their front ends. In theembodiment of FIG. 23S, longitudinal attachment zones 140 and 150 areconnected by a transversal attachment zone 1045, while longitudinalattachment zones 160, 170, which are connected to zones 140, 150respectively, converge at their front ends. The skilled person will becapable of envisaging other combinations and variations of the depictedembodiments.

The advantageous effect may be achieved even in cases wherein thelongitudinal attachment zones are not directly connected, but merelyapproach each other in certain places. For example, in the embodimentsof FIG. 20Z, 21J, 21T, the rear ends of longitudinal attachment zones140, 150 are connected by transversal attachment zone 1045, and thefront ends of longitudinal attachment zones 160, 170 are shaped suchthat they approach one another. In other embodiments, such as the onesof FIG. 21U, 21Y, 22A-22C, the longitudinal attachment zones 140, 150,160, 170 approach one another either at the ends or along their path,and this may, depending on the specific configuration, be sufficient toallow for liquid to go from one channel to another.

The embodiments of FIGS. 21D, 21E, 21N, 21T, 21U, 21X, 21Y, 22A, 22B,22C, 22N, 22O, 22P, 22Q, 22R, 22S, 23D, 23E, 23M, 23N, 23O, 23P, 23R,23T, 23U and 23V can be used for both male and female. The embodimentsof FIGS. 20A, 20B, 20C, 20D, 20E, 20F, 20G, 20H, 20I, 20J, 20K, 20L,20M, 20N, 20O, 20P, 20Q, 20R, 20S, 20T, 20U, 20V, 20W, 20Z, 21K, 21L,21M, 21O, 21P, 21Q, 21R, 21S, 21V, 21W, 21Z, 22D, 22E, 22F, 22G, 22H,22I, 22J, 22K, 22L, 22M, 22T, 22U, 22V, 22W, 22Y, 22Z, 23A, 23B, 23C,23F, 23G, 23H, 23I, 23J, 23K, 23L and 23S are preferable for male. Theembodiments of FIGS. 20X, 20Y, 21A, 21B, 21C, 21F, 21G, 21H, 21I, 21J,22X and 23Q preferable for female.

FIGS. 24A-C, 25A-25Z and FIGS. 26A-26T

In addition to the perspective view as shown in FIG. 12, FIGS. 24A-C arephotographs representing an absorbent article comprising an exemplaryembodiment of an absorbent core of the invention. FIG. 24A illustratesthe absorbent article when the absorbent core is in a dry state, whereasFIGS. 24B and 24C illustrate the absorbent article when the absorbentcore is in a wetted state. In FIG. 24A attachments zones 140, 150, 160and 170 wherein substantially no absorbent material is present, can bedistinguished. However, in the illustrated photograph 24A the attachmentzones 140, 150, 160 and 170 have been slightly darkened in order tobetter illustrate the position thereof, since due to quality restraintsof the photograph 24A a part of this visual information has been lost.FIGS. 24B and 24C are photographs of the absorbent article in a wettedstate, wherein tubes 301, 302, 303 have formed, which leads to theattachment zones 140, 150, 160 and 170 becoming more visible aschannels. Thanks to the attachment zones and associated channels 140,150, 160 and 170 the liquid is evenly spread, resulting in the formationof tubes 301, 302, 303 which provide a tub shape to the absorbent core130. Such a tub shape adapts perfectly to the body and can be seen, atleast partially, in FIG. 24C where the absorbent article is not attachedto a bottom surface at the corners of the absorbent article, which isthe case in FIGS. 24A and 24B. Further, compared to prior art solutions,the liquid is kept in an improved manner absorbed in the absorbent core130, and the risk on leakage is reduced. Also, because of the creationof the channels 140, 150, 160, 170, the liquid is absorbed faster. Seenin a longitudinal direction of the absorbent core 130, looking from thefront edge 133 to the rear edge 134, the absorbent core 130 comprisessubsequently a first, second, third, fourth and fifth zone Z1, Z2, Z3,Z4, Z5. The zones may have the features of any one of the embodimentsabove.

The embodiments of FIGS. 24A, 24B and 24C are advantageous for a maleperson. Indeed, the first and a second elongate attachment zone 140, 150extend next each other, at least in the front portion of the absorbentcore in the direction of the front edge 133 of the absorbent core, and athird and a fourth elongate attachment zone 160, 170 extend next to eachother, at least in the rear portion 130 b of the absorbent core, in thedirection of the second transverse edge 134. Measured in a transversedirection, a first maximum distance d12 between the first and the secondattachment zone 140, 150 is bigger than a second maximum distance d34between the third and the fourth attachment zone 160, 170, the firstdistance d12 between the first and the second attachment zone is atleast 5%, preferably at least 10% bigger, even more preferably at least15% bigger than a second distance d34 between the third and the fourthattachment zone. In the embodiment of FIG. 24A, the first and the secondelongate attachment zone 140, 150 each have a front end 142, 152adjacent to absorbent material and a rear end 141, 151 adjacent toabsorbent material. The third and the fourth elongate attachment zone160, 170 each have a rear end 162, 172 adjacent to absorbent materialand a front end 161, 171 adjacent to absorbent material. In theembodiment of FIG. 24B, the first and the second elongate attachmentzone 140, 150 each have a front end 142, 152 adjacent to absorbentmaterial and a rear end 141, 151 connected on the crotch line L to afront end 171, 161 of the third and the fourth elongate attachment zone160, 170. The third and the fourth elongate attachment zone 160, 170each have a rear end 162, 172 adjacent to absorbent material. In theembodiment of FIG. 24A, seen in a projection on the longitudinaldirection of the absorbent core, the first and the second attachmentzone 140, 150 extend over a length which is less than the length of thethird and fourth attachment zone 160, 170. The distance (d12) betweenthe first and the second attachment zone 140, 150 is preferably between15 and 70% of the width of the absorbent core, more preferably between20 and 50%; wherein preferably the distance (d12) between the first andthe second attachment zone is between 10 mm and 100 mm, more preferablybetween 20 mm and 80 mm, even more preferably between 30 mm and 70 mm.Preferably, the distance (d34) between the third and the fourthattachment zone is between 5 and 60% of the width of the absorbent core,more preferably between 10 and 40%; wherein preferably the distance(d34) between the third and the fourth attachment zone is between 5 mmand 60 mm, more preferably between 10 mm and 50 mm, even more preferablybetween 15 mm and 40 mm. Preferably, the length of the first and thesecond attachment zone 140, 150 is larger than 5% of the length of theabsorbent core 130; more preferably larger than 10%, even morepreferably larger than 15%. Also, preferably the length of the third andthe fourth attachment zone is larger than 5% of the length of theabsorbent core; more preferably larger than 10%, even more preferablylarger than 15%. Preferably, the length of the third and the fourthattachment zone 160, 170 is larger than the length of the first and thesecond attachment zone 130, 140, preferably at least 10% larger, morepreferably at least 20% larger. Preferably, seen in a projection on alongitudinal direction, the first and second attachment zone 140, 150 donot overlap with the third and fourth attachment zone 160, 170.

In the embodiment of FIG. 24B the first attachment zone 140 may beconnected to the third attachment zone 170 through a permanent orsemi-permanent attachment zone and the second attachment zone 150 may beconnected to the fourth attachment zone 160 through a permanent orsemi-permanent attachment zone, wherein a semi-permanent attachment zonemay loosen upon wetting to allow for a liquid flow in a transversedirection.

FIGS. 25A-25Z and FIGS. 26A-26T illustrate embodiments in which thedimensions of the longitudinal attachments zones 140, 150, 160, 170, 180in the longitudinal direction have been reduced as compared topreviously illustrated embodiments. Regarding the illustratedconfigurations of the shorter longitudinal attachments zones 140, 150,160, 170, central attachments zones 180, 180 a, 180 b, 180 c andtransversal attachment zones 1045, 1045 a, 1045 b. 1045 c as illustratedin FIGS. 25A-25Z and FIGS. 26A-26T, it is clear to the skilled personthat the above described technical considerations and advantages in viewof longer longitudinal attachments zones 140, 150, 160, 170, centralattachments zones 180, 180 a, 180 b. 180 c and transversal attachmentzones 1045, 1045 a, 1045 b, 1045 c as illustrated in the previousfigures apply in a similar way, mutatis mutandis.

The embodiments of FIGS. 25A, 25B, 25C, 25F, 25G, 25H, 25I, 25J, 25K,25L, 25O, 25P, 25R, 25S, 25T, 25U, 25V, 25W, 25X, 25Y, 25Z, 26A, 26B,26F, 26G, 26H, 26J, 26K, 26L, 26M, 26N, 26O, 26P, 26Q, 26R, 26S and 26Tcan be used for both male and female. The embodiments of FIGS. 25D, 25E,25N, 25Q, 26C, 26D, 26E and 26I are preferable for male. The embodimentsof FIG. 25M is preferable for female.

FIG. 27A-B

FIG. 27A illustrates a top view of an absorbent article, here a diaper100, in its flat out, un-contracted state with the wearer side facingthe viewer. The skilled person understands that the absorbent articlemay also be a pant or an adult incontinence garment or the like.Preferably the chassis includes side panels or ears 210, elasticized legcuffs and elastic waist elements. A front end portion of diaper 100 isconfigured as a front waist region 100 a. The opposite rear end portionis configured as a back waist region 100 b of diaper 100. Waist regions100 a and 100 b may include elastic waist elements such that they gatherabout the waist of the wearer to provide improved fit and containment.The periphery of diaper 100 is defined by the outer edges of the diaper100 in which longitudinal edges 101, 102 run generally parallel to alongitudinal axis of diaper 100 and transverse end edges 103, 104 runbetween the longitudinal edges 101, 102 generally parallel to atransverse axis of diaper 100. The chassis also comprises a fasteningsystem, which may include at least one fastening or securing member 212and at least one landing zone (not visible). The various componentswithin diaper 100 may be bound, joined or secured by any method known inthe art, for example by adhesives in uniform continuous layers,patterned layers or arrays of separate lines, spirals or spots. Top corewrap sheet, topsheet, back core wrap sheet, backsheet, absorbentmaterial and other components may be assembled in a variety ofwell-known configurations and are well known in the art.

FIG. 27B illustrates the absorbent core 130 of the absorbent article ofFIG. 27A. The absorbent article 100 comprises a liquid pervioustopsheet, a liquid impervious backsheet, and the absorbent core 130positioned in between the topsheet and the backsheet. The absorbent core130 comprises absorbent material between a top core wrap sheet and aback core wrap sheet, in a similar manner as described in the otherembodiments. Absorbent core 130 has a first and second side edge 131,132, a front edge 133 and a rear edge 134, wherein the absorbent core isprovided with a plurality of attachment zones 140, 150, 160, 170 wherethe top core wrap sheet is attached to the back core wrap sheet, andwhere preferably substantially no absorbent material is present. Seen ina longitudinal direction of the absorbent core 130, looking from thefront edge 133 to the rear edge 134, the absorbent core 130 comprisessubsequently a first, second, third, fourth and fifth zone Z1, Z2, Z3,Z4, Z5.

The absorbent core 130 comprises a front portion 130 a extending betweenthe front edge 133 and a transverse crotch line L of the absorbent core,and a rear portion 130 b extending between the rear edge 134 and thetransverse crotch line L of the absorbent core 130. The first, secondand third zone Z1, Z2, Z3 extend in the front portion of the absorbentcore and the fourth and fifth zone Z4, Z5 extend in the rear portion.Preferably, in said first and fifth zone substantially no permanentattachment zones are present. The second zone Z2 comprises a first and asecond permanent elongate front attachment zone 130, 140, said first andsecond front attachment zones 130, 140 extending from an edge of thefirst zone Z1 in the direction of the third zone Z3.

The fourth and third zone comprises a first and second rear elongateattachment zone 160, 170, said first and second rear attachment zoneextending from an edge of the fifth zone Z5 in the direction of thethird zone Z3. At least one of said second, third and fourth zonecomprises a bridging zone B allowing a liquid flow F between the firstand the second side edge 131, 132 by capillary action through theabsorbent material. The bridging zone B extends between the first frontattachment zone 140 and the first rear attachment zone 160, such thatupon wetting of the absorbent material, a front and rear channel arecreated at said first front and rear attachment zone 140, 160,respectively, wherein the bridging zone B extends between said front andrear channel. Preferably a minimum distance x between the first frontattachment zone 140 and the first rear attachment zone 160 is largerthan 3 mm more preferably larger than 5 mm. The bridging zone B furtherextends between the second front attachment zone 150 and the second rearattachment zone 170, such that upon wetting of the absorbent material, afront and rear channel are created at said second front and rearattachment zone 150, 170, respectively, wherein the bridging zone Bfurther extends between said front and rear channel. Preferably aminimum distance x between the second front attachment zone 150 and thesecond rear attachment zone 170 is larger than 3 mm more preferablylarger than 5 mm.

The first and second rear elongate attachment zones 160, 170 extend fromthe fourth zone into the third zone Z3 so that an absorbent article isformed that fits well to the body of the wearer. Preferably a distancebetween the transverse crotch line L and a transverse center line Textending perpendicular on the longitudinal direction of the absorbentcore, through the middle of the absorbent core, is smaller than 10%,more preferably smaller than 5% of the length of the absorbent core.

The first zone Z1 extends over a length corresponding with at least 5%,preferably at least 10% of the length la of the absorbent core seen inthe longitudinal direction, e.g. between 10% and 20%. The fifth zone Z5extends over a length corresponding with at least 10% of the length laof the absorbent core seen in the longitudinal direction, preferably atleast 20%, more preferably at least 25%, e.g. between 20% and 40%.

Preferably the second, the third and/or the fourth zone Z1, Z2, Z3 eachextends over a length corresponding with at least 10% of the length laof the absorbent core seen in the longitudinal direction, preferably atleast 15%. e.g. between 10% and 20% of the length of the absorbent core.Preferably the first front attachment zone 140 and the second frontattachment zone 150 are arranged symmetrically with respect to alongitudinal center axis CL of the absorbent core 130. Preferably thedistance d12 between the first and the second attachment zone is between20 mm and 70 mm, more preferably between 30 mm and 60 mm, even morepreferably between 40 mm and 55 mm. As explained in the summary, such aconfiguration is especially suitable for male persons.

Preferably the first rear attachment zone 160 and the second rearattachment zone 170 are arranged symmetrically with respect to thelongitudinal center axis CL of the absorbent core. Preferably thedistance d34 between the first and the second rear attachment zone 160,170 is between 10 mm and 50 mm, more preferably between 15 mm and 40 mm,even more preferably between 20 mm and 30 mm.

The bridging zone B extends from a first portion of the absorbent core,in the second and/or third zone Z2, Z3, to a second portion of theabsorbent core, in the second and/or third zone, wherein the firstportion is defined between the first side edge 131 and the longitudinalcenter axis CL of the absorbent core 130 and the second portion isdefined between the second side edge 132 and the longitudinal centeraxis CL of the absorbent core 130. The bridging zone B may comprisetemporary attachments between the top and back core wrap sheet which areconfigured to detach when wetted.

A first smallest distance d12 between the first and the second frontattachment zone 140, 150 is bigger than a second smallest distance d34between the first and the second rear attachment zone 160, 170. Thefirst and the second front attachment zone 140, 150 extend in alongitudinal direction of the absorbent core over a length l1 which isless than the length l3 of the first and second rear attachment zone.Preferably, the length of the first and second front attachment zone140, 150 is larger than 30 mm, more preferably larger than 40 mm, evenmore preferably larger than 50 mm.

The plurality of attachment zones 140, 150, 160, 170 may be permanentattachment zones which remain attached when wetted. The plurality ofattachment zones may extend, seen in the transverse direction of theabsorbent core, over the transverse distance which is at least 1 mm,preferably at least 3 mm, more preferably at least 4 mm, even morepreferably at least 5 mm, most preferably at least 6 mm.

Preferably, the length of the first/second front attachment zone 140,150 is larger than 5% of the length of the absorbent core: preferablylarger than 10%, more preferably larger than 15%; and/or wherein thelength of the first/second rear attachment zone 160, 170 is larger than5% of the length of the absorbent core, preferably larger than 10%, morepreferably larger than 15%. Preferably the length of the first/secondfront attachment zone is at least 10%, more preferably at least 25%,even more preferably at least 35%, or even at least 50 or 75% of thelength of the first rear attachment zone.

Preferably the distance between the first and the second frontattachment zone 140, 150 is between 15 and 70% of the width of theabsorbent core (measured perpendicular on the length la), morepreferably between 20 and 50%. Preferably the distance between the firstand the second rear attachment zone 160, 170 is between 5 and 60% of thewidth of the absorbent core, more preferably between 10 and 40%.

The plurality of attachment zones comprise at least a first and a secondelongate attachment zone 140, 150 extending next each other, at least inthe front portion of the absorbent core in the direction of the firsttransverse edge 133, and a third and a fourth elongate attachment zone160, 170 extending next to each other, at least in the rear portion 130b of the absorbent core 130, in the direction of the second transverseedge 134. Measured in a transverse direction, a first largest distanced12 between the first and the second attachment zone 140, 150 is biggerthan a second largest distance d34 between the third and the fourthattachment zone 160, 170. Preferably the first distance d12 between thefirst and the second attachment zone 140, 150 is at least 5%, morepreferably at least 10% bigger, even more preferably at least 20% biggerthan a second distance d34 between the third and the fourth attachmentzone 160, 170. The distance d12 between the first and the secondattachment zone may be between 15 and 70% of the width of the absorbentcore, more preferably between 20 and 50%; wherein preferably thedistance d12 between the first and the second attachment zone is between10 mm and 100 mm, more preferably between 20 mm and 80 mm, even morepreferably between 30 mm and 70 mm. The distance d34 between the thirdand the fourth attachment zone is between 5 and 60% of the width of theabsorbent core, more preferably between 10 and 40%; wherein preferablythe distance d34 between the third and the fourth attachment zone isbetween 5 mm and 60 mm, more preferably between 10 mm and 50 mm, evenmore preferably between 15 mm and 40 mm. Due to the specificphysiological structure of male at the genital region, such a patternhas the advantage that liquid can be distributed over substantially theentire absorbent core, and that any leakage risks in various positionsof the male wearer can be reduced.

It is clear to the skilled person that the first largest distance d12between the first and the second attachment zone 140, 150 may also besmaller than a second largest distance d34 between the third and thefourth attachment zone 160, 170. Such embodiment is particularlyadvantageous for female, due to the specific physiological structure offemale at the genital region, as liquid can be distributed oversubstantially the entire absorbent core and leakage risks in variouspositions of the female wearer can be reduced. There may also beembodiments wherein d12 and d34 are substantially equal, whichembodiments can be used for both male and female.

The absorbent core 130 comprises a front portion 130 a extending betweenthe front edge 133 and a transverse crotch line L of the absorbent core130, and a rear portion 130 b extending between the rear edge 134 andthe transverse crotch line L of the absorbent core 130. Preferably adistance between the transverse crotch line L and a transverse centerline T extending perpendicular on the longitudinal direction of theabsorbent core 130, through the middle of the absorbent core 130, issmaller than 10%, more preferably smaller than 5% of the length of theabsorbent core 130. The first and the second elongate attachment zone140, 150 each have a front end 142, 152 adjacent to absorbent materialand a rear end 141, 151 adjacent to absorbent material; and the thirdand the fourth elongate attachment zone 160, 170 each have a rear end162, 172 adjacent to absorbent material and a front end 161, 171adjacent to absorbent material. In other embodiments the first zone 140may be connected to the third zone 160 at the transverse crotch line L,and the second zone 150 may be connected to the fourth zone 170 at thetransverse crotch line.

Seen in a projection on the longitudinal direction of the absorbentcore, preferably the first and the second attachment zone 140, 150extend over a length which is less than the length of the third andfourth attachment zone 160, 170. The length of the first and the secondattachment zone 140, 150 may be larger than 30 mm, preferably largerthan 40 mm, more preferably larger than 50 mm. The length of the thirdand the fourth attachment zone may be larger than 30 mm, preferablylarger than 40 mm, more preferably larger than 50 mm. The firstattachment zone 140 and the second attachment zone 150 may be arrangedsymmetrically with respect to a longitudinal center axis of theabsorbent core 130 extending between the front edge 133 and rear edge134. Seen in a projection on a longitudinal direction, the first andsecond attachment zone 140, 150 do not overlap with the third and fourthattachment zone 160, 170. However, in other embodiments there may besome overlap.

The first attachment zone 140 may be separated from the third attachmentzone 160 by absorbent material, and the second attachment zone 150 maybe separated from the fourth attachment zone 170 by absorbent material.The absorbent material may comprise cellulosic fluff pulp and/orsuperabsorbent particles. In some embodiments the absorbent material maybe substantially fluffless.

In other non-illustrated embodiments, the first attachment zone 140 mayalso be connected to the third attachment zone 160 through a firstsemi-permanent attachment zone and the second attachment zone 150 mayalso be connected to the fourth attachment zone 170 through a secondsemi-permanent attachment zone. The semi-permanent attachment may beconfigured to release after having been in contact with urine for apredetermined period of time, and the predetermined period of time ispreferably smaller than 30 s.

The first and second attachment zone 140, 150 extend, seen in thetransverse direction of the absorbent core 130, over the transversedistance which may be at least 1 mm, preferably at least 3 mm, morepreferably at least 4 mm, even more preferably at least 5 mm, mostpreferably at least 6 mm. The first attachment zone 140 and the secondattachment zone 150 may be substantially parallel and extend in alongitudinal direction of the absorbent core 130, as shown in FIG. 27B;or an angle between the first attachment zone 140 and a longitudinaldirection of the absorbent core 130 and an angle between the secondattachment zone 150 and the longitudinal direction of the absorbent core130 may be smaller than 5° (not illustrated). The third attachment zone160 and the fourth attachment zone 170 may be substantially parallel andextend in a longitudinal direction of the absorbent core 130, as shownin FIG. 27B; or an angle between the third attachment zone 160 and alongitudinal direction of the absorbent core 130 and an angle betweenthe fourth attachment zone 170 and the longitudinal direction of theabsorbent core 130 may be smaller than 5° (not illustrated). Seen in aprojection on a longitudinal direction of the absorbent core 130, theplurality of attachment zones together may cover at least 30%,preferably at least 40% of a length of the absorbent core 130.

Preferably the plurality of attachment zones comprise substantially noabsorbent material, and may be permanent attachment zones which remainattached when wetted. In other embodiments, in the first and secondattachment zone 140, 150, the top core wrap sheet may be attached to theback core wrap sheet through permanent and semi-permanent attachmentportions, said semi-permanent portions may be being configured torelease after having been in contact with liquid whilst said permanentportions may be configured not to release after having been in contactwith liquid. A position and/or shape of one or more attachment zones ofthe plurality of attachment zones may be indicated by means of adistinguishable color and/or colored pattern. The position and/or shapeof one or more of the plurality of attachment zones may also beindicated by means of a printed ink layer. The distinguishable colorand/or colored pattern may be provided on at least one of the topsheet,the top core wrap sheet, the backsheet and the back core wrap sheet.

The areas A1, A2, A3 indicated in FIG. 27B may have a different amountof absorbent material/absorbent capacity per surface area. Preferablythe central area A3 has a larger amount of absorbent material/capacityper surface area than the intermediate area A2. Preferably, theintermediate area A2 has a larger amount of absorbent material/capacityper surface area than a circumferential area A1.

Features described above for other embodiments described above may applyin a similar manner for the embodiment of FIGS. 27A and 27B.

FIGS. 28A-E

FIGS. 28A, 28C and 28E illustrate different embodiments of a top corewrap sheet 110 and/or bottom core wrap sheet 120 of an absorbent core.FIGS. 28B, 28D and 28F illustrate schematically how attachment zones maybe provided by attaching the top core wrap sheet 110 to the bottom corewrap sheet 120 in the corresponding embodiments of FIGS. 28A, 28C and28E. FIG. 28A illustrates an embodiment wherein a separate top core wrapsheet 110 and separate bottom core wrap sheet 120 are provided andwherein between the top core wrap sheet 110 and bottom core wrap sheet120 absorbent material 105 is present. FIG. 28B illustrates theembodiment of FIG. 28A wherein the top core wrap sheet 110 is attachedto the bottom core wrap sheet 120 at attachment 140. This correspondswith the embodiments as illustrated in FIGS. 1C and 1D. FIG. 28Cillustrates an embodiment wherein first core wrap sheet 110 is used incombination with a second core wrap sheet 120 wherein the second corewrap sheet 120 comprises a fibrous substrate layer 120 a and absorbentmaterial 105 a embedded within the fibers 105 b of substrate layer 120a. In other words, in the embodiment of FIG. 28B the absorbent materialis an integral part of the second core wrap sheet 120. It is clear tothe skilled person that the first core wrap sheet 110 may correspond tothe top core wrap sheet and the second core wrap sheet 120 maycorrespond to the bottom core wrap sheet, or vice versa. FIG. 28Dillustrates the embodiment of FIG. 28C wherein the top core wrap sheet110 is attached to the bottom core wrap sheet 120 at attachment 140.FIG. 28E illustrates an embodiment wherein the top core wrap sheet 110and bottom core wrap sheet 120 are made of one piece of sheet material.In other words, the top core wrap sheet 110 is formed integrally withthe bottom core wrap sheet 120. The piece of sheet material 110, 120 iswrapped around the absorbent material 105 such that an upper portion ofthe sheet material can be considered to be the top core wrap sheet 110and a bottom portion of the sheet material can be considered to be thebottom core wrap sheet 120. FIG. 28F illustrates the embodiment of FIG.28E wherein the top core wrap sheet 110 is attached to the bottom corewrap sheet 120 at attachment 140. Preferably the attachment 140 betweenthe top core wrap sheet 110 and the bottom core wrap sheet 120 isrealized by any one of the following or a combination thereof: pressurebonding, thermo-bonding, sonic bonding, chemical bonding, adhesive,mechanical bonding. It is clear to the skilled person, that whenattachment zones are described within this disclosure, the attachmentbetween the top core wrap sheet and back core wrap sheet may beinterpreted to be formed according to any one of the above describedembodiments or combinations thereof.

FIG. 28

FIG. 28 illustrates a further embodiment of the absorbent core 130 ofthe absorbent article of FIG. 27A. According to the embodiment of FIG.28, the plurality of attachment zones comprises a first and a secondattachment zone 140, 150 extending next to each other from a crotchregion in the direction of the front edge 133, and a third attachmentzone 180 extending from the crotch region in the direction of the rearedge 134, wherein seen in a projection on a transverse direction thethird attachment zone 180 is located between the first and the secondattachment zone 140, 150. The first attachment zone 140 and the secondattachment zone 150 are substantially parallel and extend in alongitudinal direction of the absorbent core 130. The largest distancebetween the first 140 and the second attachment zone 150 is d12. Seen ina projection on the longitudinal direction of the absorbent core, thefirst and the second attachment zone extend over a length which may beless than the length of the third attachment zone. The first and thesecond elongate attachment zone 140, 150 each have a front end 142, 152adjacent to absorbent material and a rear end 141, 151 adjacent toabsorbent material; and the third elongate attachment zone 180 has arear end 182 adjacent to absorbent material and a front end 181 adjacentto absorbent material. In other embodiments, the first attachment zoneand/or the second attachment zone 140, 150 may be connected to the thirdzone 180. This embodiment is particularly advantageous for male, due tothe specific physiological structure of male at the genital region. Itis clear to the skilled person that there may also be embodimentsadvantageous for female and/or can be used for both male and female, forexample embodiments wherein the first and second attachment zone 140,150 extending next to each other from the crotch region in the directionof the rear edge 134, and the third attachment zone 180 extending fromthe crotch region in the direction of the front edge 133.

FIGS. 29-35

The exemplary embodiment of FIG. 29 is similar to the embodiment of FIG.27B, with the difference that the first attachment zone 140 and thesecond attachment zone 150 are not parallel, and diverge in thedirection of a front edge 133 of absorbent core 130. The largestdistance d12 between the first 140 and the second attachment zone 150may be between a front end 142 of the first attachment zone 140 and afront end 152 of the second attachment zone 150.

The exemplary embodiment of FIG. 30 is similar to the embodiment of FIG.29, with this difference that the first and second attachment zone 140and 150 are substantially parallel in the crotch region and diverge inthe direction of a front edge 133 of absorbent core 130. Further, thefirst attachment zone 140 may be connected to the third attachment zone160 through a first semi-permanent attachment zone 135, and the secondattachment zone 150 may be connected to the fourth attachment zone 170through a second semi-permanent attachment zone 136. The plurality ofattachment zones may be permanent attachment zones which remain attachedwhen wetted. The exemplary embodiment of FIG. 31 is similar to theembodiment of FIG. 28, with this difference that the first attachmentzone 140 and the second attachment zone 150 are not parallel as theystart from a crotch region and diverge in the direction of a front edge133 of absorbent core 130, and become substantially parallel as theyextend further in the direction of a front edge 133 of absorbent core130. The largest distance between the first 140 and the secondattachment zone 150 d12 may be between a front end of the firstattachment zone 140 and a front end of the second attachment zone 150.

The exemplary embodiment of FIG. 32 illustrates that patterns arepossible where each of the plurality of attachment zones comprise one ormore sections. For example as shown in FIG. 32, the first attachmentzone may comprise one or more sections 140, 140′, and/or the secondattachment zone may comprise one or more sections 150, 150′, and/or thethird attachment zone may comprise one or more sections 160, 160′, 160′,and/or the fourth attachment zone may comprise one or more sections 170,170′ 170″.

The exemplary embodiment of FIG. 33 illustrates that patterns arepossible where the first attachment zone 140 and the second attachmentzone 150 may be connected with a transversal attachment zone 1045′,and/or the third attachment zone 160 and the fourth attachment zone 170may be connected with a transversal attachment zone 1045. Thetransversal attachment zones 1045, 1045′ may connect the front endsand/or rear ends of the first and the second attachment zones 140, 150and/or the third and the fourth attachment zones 160, 170. Furthermore,the transversal attachment zone needs not to be straight: it may berounded as in example of FIG. 33, or take another shape.

The exemplary embodiment of FIG. 34 illustrates that patterns arepossible where the first attachment zone 140 and the second attachmentzone 150 may be connected by at least one transversal semi-permanentattachment zone 1046, 1046′, 1046″, and the third attachment zone 160and the fourth attachment zone 170 may also be connected with at leastone transversal semi-permanent attachment zone 1047, 1047′, 1047″,1047′″. The at least one transversal semi-permanent attachment zone maybe configured to release after having been in contact with urine for apredetermined period of time, wherein said predetermined period of timeis preferably smaller than 30 s. The at least one transversalsemi-permanent attachment zone may be straight, or rounded, or takeother shapes.

The exemplary embodiment of FIG. 35 illustrates that patterns arepossible that the first and second attachment zones 140, 150 aresubstantially parallel in a part of the crotch region, whilst thetransverse distance between the first and second attachment zonesgradually decrease in the direction of a front edge 133 of absorbentcore 130.

The exemplary embodiments shown in FIGS. 28 to 35 are particularlyadvantageous for male, due to the specific physiological structure ofmale at the genital region. However it is clear to the skilled personthat how to best adapt this embodiment using other configurations, suchas the ones described above, to make the embodiments advantageous forfemale, and/or suitable for both male and female. Features for otherembodiments described above may apply in a similar manner for theembodiments of FIGS. 28 to 35.

FIGS. 36A-P

FIGS. 36A-36P are top views illustrating exemplary embodiment of anabsorbent article comprising an absorbing core according to theinvention. The absorbent core has a first and second longitudinal edge131, 132 and a first and second transverse edge 133, 134. For the sakeof clarity it is noted that the first longitudinal edge 131 correspondswith a left longitudinal edge, the second longitudinal edge 132corresponds with a right longitudinal edge, the first transverse edge133 corresponds with a front transverse edge, and the second transverseedge 134 corresponds with a rear transverse edge. For the sake ofclarity, it is noted that in FIG. 36A the position of the absorbent core130 within the absorbent articles is schematically illustrated, alongwith the above described edges 131, 132, 133 and 134 of the absorbentcore. Also longitudinal portions L1, L2 of the absorbent core areillustrated, being separated by a longitudinal center axis CA. To reducethe complexity of the drawings, in FIGS. 36B and 36C merely the positionof the absorbent core 130 is indicated, whereas this indication has beenomitted in the rest of FIGS. 36D-36P. However, it is clear that forFIGS. 36D-36P a similar positioning of the absorbent core 130 andsimilar definition of longitudinal zones L1, L2 applies. The absorbentcore 130 is provided with a plurality of attachment zones comprising atleast one front attachment zone 140 and at least one rear attachmentzone 160 and with at least one bridging zone 145 extending at leastpartially between said front and rear attachment zone. The frontattachment zone 140 is positioned more to the front of the absorbentcore as compared to the rear attachment zone 160. In other words, hefront attachment zone 140 is positioned closer to the front transverseedge 133 of the absorbent core as compared to the rear attachment zone160. Moreover, the front attachment zone 140 and rear attachment zone150, when projected on a longitudinal direction L of the absorbent core,do not overlap or overlap only partially. For illustrative purposes thebridging zone 145 is delineated by dotted lines between the frontattachment zone(s) 140, 150 and the rear attachment zone(s) 160, 170,thereby extending from a first longitudinal portion L1 of the absorbentcore to a second longitudinal portion L2 of the absorbent core. It isclear that the dotted lines 145 are for illustrative purposes only andthat an actual shape of the bridging zone 145 may deviate from theillustrated region surrounded by the dotted lines. Alternatively, or inaddition to the dotted lines 145, the bridging zone may be indicated inthe figures by an arrow F which corresponds to a flow of liquid throughthe bridging zone. The first longitudinal portion L1 may be definedbetween the first longitudinal edge 131 and a longitudinal center axisCA of the absorbent core and the second longitudinal portion L2 may bedefined between the second longitudinal edge 132 and the longitudinalcenter axis CA of the absorbent core. Depending on embodiments thewording longitudinal center axis may have a different meaning. Thewording longitudinal center axis may refer to an axis in thelongitudinal direction of the absorbent core and running trough themiddle of the absorbent core in the transverse direction of theabsorbent core, thereby dividing the absorbent core in a firstlongitudinal portion L1 and a second longitudinal portion L2.Alternatively, or in addition the wording longitudinal center axis mayrefer to an axis in the longitudinal direction of the absorbent corepositioned between two neighbouring longitudinal portions L1, L2. Uponwetting of the absorbent material, a front and rear channel are createdat said front and rear attachment zone(s) 140, 150, 160, 170,respectively, wherein the bridging zone 145 allows a liquid flow,illustrated by arrow F, between the first longitudinal portion L1 andthe second longitudinal portion L2, e.g. by capillary action and/or massflow. It is clear that the arrow F is for illustrative purposes only andthat an actual path of the liquid flowing through the bridging zone 145may deviate from the illustrated arrow F.

FIGS. 36A-36G illustrate embodiments wherein the absorbent corecomprises one front attachment zone 140, one rear attachment zone 160,and a bridging zone 145 at least partially between the front attachmentzone 140 and rear attachment zone 160. In FIG. 36A the front attachmentzone 140 and the rear attachment zone are aligned with each other andare oriented substantially along the longitudinal central axis CA of theabsorbent core. Projections of the attachments zones 140 and 160 on thelongitudinal direction L do not overlap. The attachment zones 140 and160 divide the absorbent core into two longitudinal portions L1 and L2.The bridging zone 145 extends between the front attachment zone 140 andthe rear attachment zone 160, from the first longitudinal portion L1 tothe second longitudinal portion L2. The first longitudinal portion L1may be defined between the first longitudinal edge 131 and thelongitudinal center axis CA of the absorbent core and the secondlongitudinal portion L2 may be defined between the second longitudinaledge 132 and the longitudinal center axis CA of the absorbent core.Alternatively the first and second longitudinal portions L1 and L2 maybe defined as being separated by the front and/or rear attachments zone140, 160. However, because of the specific positioning and orientationof attachments zones 140, 160 in FIG. 36A, both definitions of thelongitudinal portions L1 and L2 result in the same configuration of theabsorbent core. When a liquid insult is received on either one of thelongitudinal portions L1 or L2, the bridging zone 145 allows for liquidto travel to the other portion, where no liquid insult has beenreceived. In this manner, although a liquid insult is received at oneside (left or right) of the attachments zones 140, 150 absorbentmaterial located at the other side (right or left) of the attachmentszones 140, 150 can be utilized for absorbing the liquid. This results inimproved overall absorbing capacity as compared to prior art absorbentarticles wherein the absorbent core has no bridging zones which allowliquid communication through/over attachment zones wherein substantiallyno absorbent material is present. FIG. 36B illustrates a similarembodiment as FIG. 36A, with the difference that the front and rearattachments zones 140, 160 are not aligned in FIG. 36B, however thefront and rear attachments zones 140, 160 are oriented substantiallyparallel to each other. Projections of the attachments zones 140 and 160on the longitudinal direction L do not overlap. FIG. 36C illustrates asimilar embodiment as FIG. 36B, with the difference that the front andrear attachments zones 140, 160 in FIG. 36C are positioned in such a waythat projections of the attachments zones 140 and 160 on thelongitudinal direction L do partially overlap. This results in abridging zone 145 which allows for liquid to flow from one longitudinalportion to the other longitudinal portion along a curved pathillustrated by the arrow F. It is clear to the skilled person thatliquid may also flow along a straight angled path through the bridgingzone 145, from a location more to the rear in longitudinal portion L1 toa location more to the front in longitudinal portion L2. In FIG. 36D,the front attachment zone 140 and rear attachment zone 160 are curvedattachment zones. In this embodiment additional space for the bridgingzone 145 is created by the curvature of the attachments zones 140 and160. In FIG. 36E, a semi-permanent attachment 185 is provided betweenthe front and rear attachments zones 140, 160. In this embodiment, thesemi-permanent attachment 185 is aligned with the front and rearattachment zones 140, 160. In this manner, absorption capacity of theabsorbent core may benefit from both capillary action and mass flow ofliquid in order to enable liquid to be distributed quickly andadequately. In reaction to a first liquid insult the liquid will bedistributed by mass flow by means of the channel(s) formed at thesemi-permanent attachment(s). However, in reaction to further liquidinsults, the semi-permanent attachment(s) will release, loosen and/ordissolve which will lead to the bridging zone allowing the liquid topass through by capillary action. In other words, the bridging zone 145may comprise a semi-permanent attachment 185 in a first stage ofwetting, and may comprise substantially no attachments in a furtherstage of wetting. In FIG. 36F a similar configuration as illustrated inFIG. 36E is shown with the difference that the semi-permanent attachment185 is oriented substantially in the transverse direction of theabsorbent core. In this manner the functionality of the bridging zonevia mass flow in the transverse direction is further enhanced. In FIG.36G, the capillary bridge comprises a fluff fibers 200 which allow forliquid to flow between the front and rear attachment zones 140 and 160,respectively. Alternatively, or in addition a strip of airlaid fluffmaterial may be provided at the bridging zone to further improve liquidcarrying capacity of the bridging zone.

FIGS. 36H-36P illustrate embodiment wherein the absorbent core comprisesan additional front attachment zone 150 and/or additional rearattachment zone 170. The absorbent core according to embodimentsillustrated in FIGS. 36H-36P comprise one or more bridging zones. InFIG. 36H, three bridging zones may be distinguished, one bridging zonecomprising no attachments between second front attachment zone 150 andrear attachment zone 160, one bridging zone comprising a semi-permanentattachment 185 between the first and second front attachment zones 140and 150, and one bridging zone comprising a semi-permanent attachment195 between the first and second rear attachment zones 160, 170. In FIG.36I, a first and second front attachment zone 140, 150 are illustrated,wherein a bridging zone is formed between the first and second frontattachment zones 140, 150 on the one hand and the rear attachment zone160 on the other hand. Alternatively the skilled person understands thaton the one hand a first (partial) bridging zone is formed between thefirst front attachment zone 140 and the rear attachment zone 160, andthat on the other hand a second (partial) bridging zone is formedbetween the second front attachment zone 150 and the rear attachmentzone 160. In FIG. 36J, a similar embodiment as illustrated in FIG. 36Iis shown, with the difference that a projection of the rear attachmentzone 160 on the longitudinal direction L now partially overlaps with theprojection of the first front attachment zone 140 and/or projection ofthe second front attachment zone 150, which result in the bridging zonetaking a curved form through which liquid can flow between and/or passedthe front and rear attachment zones. In FIG. 36K, a first and secondrear attachment zone 160, 170 are illustrated, wherein a bridging zoneis formed between the first and second rear attachment zones 160, 170 onthe one hand and the front attachment zone 140 on the other hand.Alternatively the skilled person understands that on the one hand afirst (partial) bridging zone is formed between the first rearattachment zone 160 and the front attachment zone 140, and that on theother hand a second (partial) bridging zone is formed between the secondrear attachment zone 170 and the front attachment zone 160. This isillustrated by semi-permanent attachments 185 and 195. In FIG. 36L, afirst and second rear attachment zone 160, 170 are illustrated, whereina bridging zone, comprising substantially no attachments, is formedbetween the first and second rear attachment zones 160, 170 on the onehand and the front attachment zone 140 on the other hand. Alternativelythe skilled person understands that on the one hand a first (partial)bridging zone, comprising substantially no attachments, is formedbetween the first rear attachment zone 160 and the front attachment zone140, and that on the other hand a second (partial) bridging zone,comprising substantially no attachments, is formed between the secondrear attachment zone 170 and the front attachment zone 160. In FIGS.36M-36P, a first and second front attachment zone 140, 150 areillustrated in combination with a first and second rear attachment zone160, 170. In FIGS. 36M and 36N a bridging zone comprising substantiallyno attachments is formed between the front attachments zones 140, 150and the rear attachment zones 160, 170. In FIG. 36O, the bridging zonecomprises a semi-permanent attachment 185 between the first frontattachment zone 140 and the first rear attachment zone 160, and asemi-permanent attachment 195 between the second front attachment zone150 and the second rear attachment zone 170. In FIG. 36P, a bridgingzone is provided between the front attachment zones 140, 150 and therear attachment zones 160, 170 which bridging zone comprises flufffibers and/or a strip of airlaid fluff material. In the embodiments ofFIGS. 36M-36P, the first front attachment zone 140 and the second frontattachment zone 150 are arranged symmetrically with respect to thelongitudinal center axis of the absorbent core. Preferably the distancebetween the first and the second attachment zone is between 20 mm and 70mm, more preferably between 30 mm and 60 mm, even more preferablybetween 40 mm and 55 mm. Especially for male persons, this distance ispreferably sufficiently large such that urine is captured mainly in thearea between the first front attachment zone 140 and the second frontattachment zone 150.

The first front attachment zone 140 and the second front attachment zone150 may be substantially parallel and may extend in a longitudinaldirection of the absorbent core 130 as illustrated in FIGS. 36M, 36O and36P. Alternatively an angle between the first front attachment zone 140and a longitudinal direction of the absorbent core and an angle betweenthe second front attachment zone 150 and the longitudinal direction ofthe absorbent core may be smaller than 5° such as illustrated in FIG.36N, wherein the first and second front attachment zones 140, 150diverge in the direction of the front transverse edge 133.

Preferably, a minimal width of the bridging zone 145 is at least 5 mm,preferably at least 10 mm and more preferably at least 15 mm. In thismanner, a sufficient width is available to allow liquid to flow and/ortravel through the bridging zone 145. The minimal width of the bridgingzone 145 is the smallest distance between the front attachment zone 140,150 and the rear attachment zone 160, 170 between which liquid isallowed to flow by means of the bridging zone.

It is clear to the skilled person that in the above describedembodiments, alternatively or in addition to bridging zones comprisingsubstantially no attachments, bridging zones comprising at least onesemi-permanent attachment can be provided, and vice versa. It is furtherclear to the skilled person, that although not explicitly indicated inFIGS. 15-26, these figures may illustrate alternative bridging zoneconfigurations wherein liquid flow is enabled from one longitudinalportion to another longitudinal portion of the absorbent core whereinthe liquid passes between at least one front attachment zone and onerear attachment zone.

It is further clear to the skilled person that in the above describedembodiments, alternatively or in addition to bridging zones comprisingsemi-permanent attachments which are substantially aligned with thefront and/or rear attachments zones 140, 150, 160, 170, semi-permanentattachments may be provided which are positioned either substantiallyperpendicular to the front and/or rear attachments zones 140, 150, 160,170, or positioned in substantially the transverse direction of theabsorbent core 130. In this manner, mass flow across and/or betweenand/or throughout the front and/or rear attachments zones is improved ina first stage of wetting. In a second stage of wetting, when thesemi-permanent attachments have resolved, capillary action can takeplace to allow liquid flow across and/or between and/or throughout thefront and/or rear attachments zones or the corresponding channels formedthereby.

FIGS. 37-41 and 42A-42B

FIG. 37 illustrates an exemplary embodiment of a mechanical removalmeans. The locally removing of the absorbent material F may be done by afirst roller brush 16. The first roller brush 16 is mounted above thefirst sheet material 110 on the rotating member 10, downstream of thehopper 40. Optionally, the first roller brush 16 may be mounted abovethe first sheet material 110 on the rotating member 10, directlydownstream of a lower opening of the hopper 40. The axis of the firstroller brush 16 is parallel to the axis of the rotating member 10. Therotation of the first roller brush 16 may be driven by a firstvariable-speed motor. Speed and/or direction of the rotating movement ofthe first roller brush 16 may be adjustable. The rotational movement ofthe first roller brush 16 scrapes or sweeps the absorbent material Fapplied on the attachment portions 14 such that substantially noabsorbent material F is present on the attachment portions 14, and theremaining portions 21 are still covered with absorbent material F. Adistance between the first roller brush 16 and the first sheet material110 may be adjustable by a further first adjusting means. Further, asillustrated in FIGS. 42A and 42B, a second roller brush 19 may beprovided downstream of first roller brush 18, in order to flatten thelayer o absorbent material on the suction zones 13, 13′. The speedand/or direction of the rotating movement of the second roller brush 19,and/or the distance between the second roller brush 19 and the firstsheet material 110, may be adjusted depending on the material of thefirst sheet material 110 and/or the material of the absorbent material Fand/or the channel(s) that are intended to be made.

In other embodiments, the locally removing of the absorbent material Fmay be done by an air jet system 18 as illustrated in FIG. 41, seefurther.

The removed absorbent material F may be discarded and/or collectedand/or recycled by a further discharge means 23, such that the removedabsorbent material can be further used. The discharge means preferablycomprises a vacuum source to collect the removed absorbent material. Ina fourth step a second sheet material 120 is applied on top of theabsorbent material on the first sheet material 110, e.g. using a furtherrotating member 20. One of said first and second sheet material is a topcore wrap sheet material, and the other one is a back core wrap sheetmaterial. In the illustrated embodiment it is assumed that the firstsheet material 110 is the top core wrap sheet material.

In a fifth step the first sheet material 110 is attached to the secondsheet material 120 at least in the attachment portions 14, and such thatattachment zones 140 are formed. The attaching may be done by applyingpressure and/or heat on the top core wrap sheet material 110 and/or onthe back core wrap sheet material 120 in the attachment portions 14,e.g. by a rotating member 30 and/or opposite rotating member 30′ whichis provided with at least a first and a second seal rib 31, 32dimensioned for applying pressure and/or heat on the top core wrap sheetmaterial 110 in the attachment portions 14 in order to create theattachment zones 140. Additionally or alternatively adhesive may beapplied to the back and/or top core wrap sheets, to release the bondbetween the top and back core wrap sheets, e.g. using the methodsdescribed in the embodiments above. FIG. 38 shows a cross section of afirst exemplary embodiment of a first roller brush 16 being appliedabove a first sheet material 110. After the absorbent material F isapplied via a hopper 40 on said first sheet material 110 on the rotatingmember 10 (as explained in connection with FIG. 37) with non-suctionzones 11, 12 and suction zones 13, attachment portions 14 of the firstsheet material located above the non-suction zones 11, 12; 11′, 12′ andremaining portions 21 of the first sheet material located above thesuction zones 13, 13′ are covered with the absorbent material F.

However, because of the suction effect more material will be suckedabove the suction zones 13, 13′. The first roller brush 16 has bristles22 which may have substantially the same length, the tips of whichcreate a more or less even cylinder-shaped surface around the firstroller brush 16. As the first roller brush 16 rotates, the bristles 19scrape or sweep the absorbent material applied on the first sheetmaterial 110 such that substantially no absorbent material F remainspresent on the attachment portions 14, whilst the remaining portions 21remain covered with absorbent material. The bristles 22 of the firstroller brush 16 may comprise a flexible material, preferably plastic,e.g. nylon, such that damage to the first sheet material 110 can beprevented or reduced during the removal of absorbent material.

FIG. 39 shows a cross section of a second exemplary embodiment of afirst roller brush 16 having an axis A1 and being applied above a firstsheet material 110 on a rotating member 10 and with non-suction zones11, 12 and suction zones 13. In this embodiment, the bristles 22 a, 22 bare amounted on the first roller brush 16 to target the attachmentportions 14 of the first sheet material 110 located above thenon-suction zones 11, 12. The advantage of this embodiment is that itresults in a more specific removal of absorbent material F on theattachment portions 14, without effecting or with minimal effects on theabsorbent material F on the remaining portions 21 of the first sheetmaterial 110. The bristles 22 a, 22 b of the first roller brush 16 maycomprise a flexible material, preferably plastic, e.g. nylon, such thatdamage to the first sheet material 11 can be prevented or reduced duringthe removal of absorbent material. The position of the bristles 22 a, 22b targeting the attachment portions 14 may be configured to beadjustable depending on the size of the articles to be made, and/or theintended position of the channels, and/or other configurations known toa skilled person.

FIG. 40 shows a cross section of a third exemplary embodiment of a firstroller brush 16 being applied above the first sheet material 110 on arotating member 10 with non-suction zones 11, 12 and suction zones 13.In this embodiment, the bristles 22 a, 22 b. 22 c form a stepped profilewith bristle zones 22 a, 22 b located above the attachment portions 14and zones 22 c above the remaining portion. The bristles 22 c arepreferably less flexible and/or less bendable that the bristles 22 a, 22b. Preferably the length of the bristles 22 a, 22 b targeting theattachment portions 14 is longer than the length of the bristles 22 ctargeting the remaining portions 21. The bristles 22 a. 22 b, 22 c ofthe first roller brush 16 may comprise a flexible material, preferablyplastic. e.g. nylon, such that damage to the first sheet material 11 canbe prevented or reduced during the removal of absorbent material. In afurther embodiment, the bristles 22 a. 22 b targeting the attachmentportions 14 comprise a flexible material, preferably plastic, e.g.nylon, while the bristles 22 c targeting the remaining portions 21comprise a rigid material, such as metal, such that while the bristles22 a, 22 b targeting the attachment portions 14 remove the absorbentmaterial on the attachment portions 14, the bristles 22 c targeting theremaining portions 21 scrapes the absorbent material applied on theremaining portions 21 to make the surface of the absorbent materialeven.

FIG. 41 shows a cross section of an exemplary embodiment of an air jetsystem 18 being applied above the first sheet material 110 on a rotatingmember 10 with non-suction zones 11, 12 and suction zones 13. The airjet system is configured to blow air onto the attachment portions 14 toremove the absorbent material F thereon. Position of the air outlets 24a, 24 b of the air jet system 18 may be configured to be adjustabledepending on the size of the articles to be made, and/or intendedposition of the channels, and/or other configurations known to a skilledperson. A second roller brush 19 may be implemented in the apparatus, incombination with the first roller brush 16 or in combination with theair jet system 18 as is shown in FIGS. 42A and 42B respectively. The twobrushes 18, 19 may be arranged in series, wherein the task of brush 18is to perform cleaning of the attachment portions 14, and the task ofbrush 19 is to make the surface of the absorbent layer on the remainingportion 21 more even. The material of the bristles of brush 18 ispreferably more flexible that the material of the bristles of brush 19.The second roller brush 19 is configured to scraping the absorbentmaterial applied on the remaining portions 21 such that surface of theabsorbent material F is even. Preferably bristles of the second rollerbrush 19 comprise a rigid material, such as metal. Preferably the secondroller brush 19 is mounted above the first sheet material 110 on therotating member 10, downstream of the first roller brush 16, ordownstream of the air jet system 18. Optionally, the first roller brush16 may be mounted above the first sheet material 110 immediatelydownstream of the lower opening of the hopper 40. The axis A2 of thesecond roller brush 19 is parallel to the axis A of the rotating member10. The rotation of the second roller brush 19 may be driven by a secondvariable-speed motor. Speed and/or direction of the rotating movement ofthe second roller brush 19 may be adjustable. The rotational movement ofthe second roller brush 19 scrapes the absorbent material remaining onthe remaining portions 21 such that the absorbent material creates aneven surface on the remaining portions 21. A distance between the secondroller brush 19 and the first sheet material 110 may be adjustable by afurther second adjusting means (not shown). The speed and/or directionof the rotating movement of the second roller brush 19, and/or thedistance between the second roller brush 19 and the first sheet material110, may be adjusted depending on the material of the first sheetmaterial and/or the material of the absorbent material and/or thechannel(s) that are intended to be made, and/or other configurationsknown to a skilled person.

The above-described method may yield an absorbent article with higherdry and especially wet integrity and which avoids unwanted migration ofabsorbent material, while avoiding the risk of damaging the attachmentzones during manufacture which may impede the formation of channels. Theskilled person will understand that this method is not limited to thisparticular configuration of attachment zones and will know how to bestadapt the binder application zones on the first and second sheetmaterials 110, 120 for other configurations, such as the ones describedin the present application. More in particular the skilled personunderstands that the method is also useful for absorbent cores with onlyone attachment zone or with more than two attachment zones.

In non-illustrated embodiments, the brushes 18 may be provided withflexible scraping or wiping element, at least in the zones of theattachment portions 14, instead of with a plurality of bristles. In yetother embodiments the brushes 18 may be replaced with other localmechanical removing means. e.g. a non-rotating mechanical removal meanssuch as a scraper or wiper in combination with a suction means to suckthe material scraped off in the attachment portions 14.

It is further noted that the use of a brush 18 in not required in allembodiments of the invention. In certain embodiments, the inserts 11, 12may have a shape and height which is such that substantially noabsorbent material is present on the attachment portions 14. Increasingthe height od the inserts 11, 12 may be useful when the layer ofabsorbent material F is thicker. The inserts 11, 12 in FIG. 10A have atrapezoidal shape with a bottom side B1, a top side B2, and a height H.However other shapes are possible. Also, the dimensions may vary. Theheight H may be e.g. between 2 and 10 mm, preferably between 3 and 7 mm.The inserts may be removably fixed so that they can be easily changed infunction of the materials used.

Whilst the principles of the invention have been set out above inconnection with specific embodiments, it is to be understood that thisdescription is merely made by way of example and not as a limitation ofthe scope of protection which is determined by the appended claims.

1. An apparatus for manufacturing an absorbent article, said apparatuscomprising: a. a rotating member for guiding a first sheet materialalong a surface thereof, wherein the surface of said rotating member isprovided with at least one suction zone and at least one non-suctionzone; b. an application unit configured for applying an absorbentmaterial on said first sheet material on the rotating member; c. a firstroller brush configured for locally removing the absorbent materialapplied on at least one attachment portion of the first sheet materiallocated above the at least one non-suction zone, such that at least oneremaining portion of the first sheet material located above the at leastone suction zone is covered with absorbent material and substantially noabsorbent material is present on the at least one attachment portion; d.a sheet feed unit configured for applying a second sheet material on topof the absorbent material on the first sheet material; wherein one ofsaid first and second sheet material is a top core wrap sheet material,and the other one is a back core wrap sheet material; e. an attachmentunit configured for attaching said first sheet material to said secondsheet material at least in the at least one attachment portion.
 2. Theapparatus of claim 1, wherein the first roller brush has bristles of aflexible material, preferably nylon.
 3. The apparatus of claim 1,wherein the first roller brush has bristles of substantially the samelength creating a more or less even cylinder-shaped surface around thefirst roller brush.
 4. The apparatus of claim 1, wherein the firstroller brush has one or more first bristle zones located above theattachment portions and one or more second bristle zones located abovethe remaining portions, wherein the first bristle zones are differentfrom the second bristle zones.
 5. The apparatus of claim 1, furthercomprising a second roller brush configured for scraping the absorbentmaterial applied on the at least one suction zone such that a surface ofthe absorbent material above the at least one non-suction zone issubstantially even.
 6. The apparatus of claim 5, wherein the secondroller brush has bristles which are less flexible than bristles of thefirst roller brush.
 7. The apparatus of claim 1, wherein said at leastone non-suction zone comprises at least one elongate zone extending in acircumferential direction of the rotating member.
 8. The apparatus ofclaim 1, wherein the at least one non-suction zone is formed by at leastone element protruding outwardly from an outer surface of the rotatingmember.
 9. The apparatus of claim 1, wherein the first roller brush ismounted above the first sheet material immediately downstream of thelower opening of the application unit.
 10. An apparatus formanufacturing an absorbent article, said apparatus comprising: a. arotating member for guiding a first sheet material along a surfacethereof, wherein the surface of said rotating member is provided with atleast one suction zone and at least one non-suction zone; b. anapplication unit configured for applying an absorbent material on saidfirst sheet material on the rotating member; c. an air jet systemconfigured for locally removing the absorbent material applied on atleast one attachment portion of the first sheet material located abovethe at least one non-suction zone, such that at least one remainingportion of the first sheet material located above the at least onesuction zone is covered with absorbent material and substantially noabsorbent material is present on the at least one attachment portion; d.a sheet feed unit configured for applying a second sheet material on topof the absorbent material on the first sheet material; wherein one ofsaid first and second sheet material is a top core wrap sheet material,and the other one is a back core wrap sheet material; e. an attachmentunit configured for attaching said first sheet material to said secondsheet material at least in the at least one attachment portion.
 11. Theapparatus of claim 10, further comprising a roller brush configured forscraping the absorbent material applied on the at least one suction zonesuch that a surface of the absorbent material above the at least onenon-suction zone is substantially even.
 12. A method for manufacturingan absorbent article, said method comprising: a. guiding a first sheetmaterial along a rotating member, wherein a surface of said rotatingmember is provided with a pattern with at least one suction zone and atleast one non-suction zone; b. applying an absorbent material on saidfirst sheet material on the rotating member; c. locally removing theabsorbent material applied on at least one attachment portion of thefirst sheet material located above the at least one non-suction zone,such that at least one remaining portion of the first sheet materiallocated above the at least one suction zone is covered with absorbentmaterial and substantially no absorbent material is present on the atleast one attachment portion; wherein the locally removing of theabsorbent material is done by a first roller brush; d. applying a secondsheet material on top of the absorbent material on the first sheetmaterial; wherein one of said first and second sheet material is a topcore wrap sheet material, and the other one is a back core wrap sheetmaterial; e. attaching said first sheet material to said second sheetmaterial at least in the at least one attachment portion, and such thatat least one attachment zone is formed.
 13. The method of claim 12,wherein locally removing the absorbent material comprises targeting theat least one attachment portion of the first sheet material locatedabove the at least one non-suction zone with first bristles of the firstroller brush.
 14. The method of claim 12, wherein said at least onenon-suction zone comprises at least one elongate zone extending in acircumferential direction of the rotating member.
 15. The method ofclaim 12, wherein the method further comprises scraping the absorbentmaterial applied on the at least one remaining portion by a secondroller brush, such that surface of the absorbent material issubstantially even.
 16. The method of claim 16, wherein the secondroller brush has bristles which are less flexible than bristles of thefirst roller brush.
 17. The method of claim 12, wherein said methodfurther comprises discarding and/or collecting and/or recycling of theabsorbent material removed from the at least one attachment portion. 18.The method of claim 12, wherein a binder is applied to at least oneportion of the first sheet material at a distance from the intendedposition of the first attachment zone, prior to step b, and whereinbinder is applied to at least one portion of the second sheet materialincluding the intended position of the at least one attachment zoneprior to step d.
 19. The method of claim 18, wherein preferably the atleast one portion of the first sheet material and the at least oneportion of the second sheet material are chosen such that in theapplication and attachment of the first sheet material to the secondsheet material the plurality of portions are complementary.
 20. Themethod of claim 18, substantially the entire surface of the absorbentarticle is provided with binder on either the first sheet material orthe second sheet material.